جستجوی مقالات مرتبط با کلیدواژه « hormozgan province » در نشریات گروه « آبخیزداری، بیابان، محیط زیست، مرتع »

In order to determinating of the grazing behavior tali goat as dominant livestock, this investigation was done from 2007 for 4 years in Sirik rangeland of Hormozgan province. Parameters examined in this study included time arrival and departure of livestock from pastures, daily distance traveled by livestock, livestock path in the rangeland considering the slope, livestock speed (mean and maximum) and the time spent for livestock rest, grazing and movement per day. To determine the parameters, Garmin GPS was used on the back of a 4- year-old ewe using a special belt. After livestock exit from the fold, GPS was active and at the end of the day all recorded data were extracted by Mod-track in Ilwis software. The livestock path was determined by shepherd. The results of livestock grazing behavior in the months of the grazing season for the four years studied showed that there was a significant difference between average mileage and grazing time in different years and for the months of the grazing season, all behaviors except mileage. The average speed of livestock was 2.65 km / h, the distance traveled was 12.8 km and the grazing time was 4 hours and 49 minutes. Also, during the study years, 44 to 45% of the time when livestock was moving in the pasture was dedicated to grazing. It is worth mentioning that the information extracted from the correlation of GPS livestock route map with the slope map of the region showed that in all five months during the years under review, all distance traveled by livestock is in the slope class of 0-8%.

One of the important factors in determining the grazing capacity of rangelands is determining the preferred value of rangeland plants according to the type of livestock using the rangeland and its changes during the grazing season. In this study, the preference value of rangeland species in Zaminsang rangeland in Hormozgan province in the months of grazing season (January to May) and different years (2007-2010) was investigated. To determine the preference value, the method of utilization percentage of plant species and determination of preference index were used. The results were analyzed in a split plot statistical design in time in a randomized complete block design in SAS software and the statistical mean of the studied trait was compared with LSD test. The results showed that the most preferred livestock is primarily Aeluropus lagopoides and Atriplex leucoclada and Alhagi graecorum. The lowest percentage of exploitation was from Halocnemum strobilaceum and Desmostachya bipinnata. Based on the preference value index classification, Aeluropus lagopoides and Atriplex leucoclada species are relatively palatable species (relative preference), Alhagi graecorum and Halocnemum strobilaceum species are moderately palatable species (moderate preference) and Desmostachya bipinnata was one of the almost non-palatable (relative avoidance) species.

Calculating rangeland capacity and determining the allowable use for important rangeland species is necessary for sustainable range management. By having the rangeland capacity and presenting accurate management plans, the destruction of vegetation and soil and the reduction of water resources can be prevented. Suitable grazing intensity causes continuous and economic use in the rangeland. Therefore, a study was conducted on the effects of different harvest intensities on forage production of three species Halocnemum strobilaceum, Desmostachya bipinnata, and Aeluropus lagopoides Hormozgan province three years from 2008 to determine the most appropriate level of exploitation. Experimental treatments included four harvesting intensities of 25, 50, and 75% and control (without harvest). In each treatment, ten rootstocks of the species were considered replicates and evaluated on each of the dependent variables. The results were analyzed in SAS software. The results showed that harvest intensity affected the forage production and all treatments were significantly different from the control. Therefore, up to 50% of the allowable use for Aeluropus lagopoides and Desmostachya bipinnata, and up to 75% for Halocnemum strobilaceum is suggested to maintain the health and vigor of these species during the harvest years. According to the above findings, this allowable use can be considered for similar areas in terms of climate together with information about other plants.

Platychaete aucheri is one of the exclusive and important rangeland species in the south of the country that has an important role in animal nutrition. In this study, using a generalized increase model, the pattern of response of this species to the slope of soil and topographic factors in its habitats in the province Hormozgan was identified and for this purpose, three regions of Bastak, Sirmand and Kuh-e-Geno, which were the main habitats of the species, were selected and vegetation information and habitat factors of the species were collected. The results showed that all soil measurement parameters except acidity were significantly different at 5% level. The highest electrical conductivity, the percentage of soil saturation and silt was in Bastak region, the highest amount of soil lime and sand was in Sirmand region and the highest percentage of organic carbon, nitrogen and soil clay was in Geno mountain region. Soil texture in Bastak was loam and sandyloam, in Sirmand was sandyloam and in Geno region was sandyclayloam. The application of a generalized collective model for each of the environmental variables showed that the response of Platychaete aucheri to soil sand percentage, soil silt percentage, soil salinity, soil lime percentage, slope and altitude was significant. With increasing sand percentage and soil lime percentage, the species response is increasing and the presence of species is increasing. With increasing soil silt percentage and with increasing slope percentage, species response is decreasing and species presence is less. By increasing the electrical conductivity of the soil, up to 25 species responses are increased, and after that, with the increase of electrical conductivity of the soil, the presence of the species decreases. With increasing the percentage of soil saturated moisture to 20%, the species response is increasing and since then with increasing the percentage of soil saturated moisture to 35%, the presence of the species has decreased and again with increasing the percentage of soil saturated moisture, the presence and growth of the species has increased. With increasing altitude up to 400 meters, the species response is increasing and since then with increasing altitude to 650 meters, the presence of the species has decreased and again with increasing altitude, the presence and growth of the species has increased.

Taverniera spartea is one of the most important species in the Gulf and Omani rangelands. In this study, some ecological needs of Taverniera spartea and their response to soil and topographic factors in three main habitats in Hormozgan province (Siahoo, Ahmadi and Bashagard) were determined. The results showed that the percentage of cover was significant at the level of 1% and the percentage of bare soil and the percentage of rocks and pebbles at the level of 5% was significant. Applying the generalized collective model for each of the environmental variables showed that the variables of soil lime percentage, clay percentage, acidity, soil organic carbon content, soil nitrogen and bare soil percentage on species yield are significant. Increasing the percentage of soil clay from the Monotonic decrease, increasing the acidity of the soil, from the Bimodal distribution, increasing the amount of soil lime and also the percentage of bare soil from the Unimodal and increasing the percentage of organic carbon and soil nitrogen from the Monotonic increase followed. The phenological study of the species showed that the growth of this plant starts from the second decade of November and from the third decade of May, enters a stage of stagnation. Considering the nutritional value of the species and its role in the protection of rangeland soil, it is recommended to plant this species in the degraded rangeland areas that have the conditions for its establishment.

Considering the extensive degradation of Iranian rangelands and forests due to livestock grazing and the land use change in recent decades, rangeland management requires a comprehensive knowledge concerning the ecological characteristics of native plant species and how they respond to environmental factors. Developed from the Fabaceae legume family, Taverniera spartea is an important species indigenous to the Persian Gulf and Omani rangelands of Iran. As a rich source of plant protein, this plant has a high value in feeding animals. Possessing a strong root system, the plant plays an important role in biologically stabilizing nitrogen, increasing soil's organic matter, improving soil texture, and preventing soil erosion. Lack of sufficient knowledge concerning this plant species and the relationship between soil, environmental factors, and the vegetation status is a serious obstacle to using soil for biological regeneration of degraded rangelands and planning for optimal management of existing habitats. Therefore, this study sought to investigate the response pattern of the plant to the slope of soil and topographic factors in its habitats in Hormozgan province using the generalized incremental model.

This study was conducted in Siahoo, Ahmadi, and Bashagard regions in Hormozgan province. Siahoo region is located 55 km north of Bandar Abbas at an altitude of 450 meters above sea level, Ahmadi region is located 95 km north of Bandar Abbas at an altitude of 750 meters above sea level, and Bashagard region is located 135 kilometers east of Bandar Abbas at an altitude of 600 meters above sea level. The average rainfall of Siahoo, Ahmadi, and Bashagard region is 171.54, 183.61, and 193.18 mm, respectively, and their average annual temperatures are 27.34, 25.52, and 28.6 degrees Celsius respectively. Located among the semi-humid hot regions, Siahoo region is a semi-dry hot region with the average minimum and maximum absolute temperature of 21.8 and 32.3 ° C, respectively. Moreover, Bashagard is a hot dry region with the average minimum and maximum absolute temperature of 21.1 and 33.9 degrees Celsius, respectively. A 30 plots were chosen via random-systematic sampling for each ecological unit (90 plots in three study areas). Then, the percentage of canopy cover was measured for each species located inside the plots, and a soil sample was taken from each plot for analysis. Moreover, conventional comparative analysis method was used as a nonlinear method to investigate the relationship between effective and significant environmental variables and vegetation, and forward selection was used to reduce error. On the other hand, the significance of the relationship between species composition and axes obtained from environmental variables was investigated using the Monte Carlo permutation test. Furthermore, a generalized incremental model was used to predict the response of plant species to changes in environmental factors. Finally, the Akaic information criterion was used to rank the variables affecting the performance of the species.

This study found that the soil texture was sandy loam in all three habitats. The amount of electrical conductivity in the three habitats revealed a significant difference. Soil acidity was also higher in Bashagard region than the other two ones. The highest amount of soil lime was found in Siahoo region with 54.3%, and the lowest one was observed in Ahmadi region with 19.3%. It was also found that as the soil clay percentage increased, the species response was decreased and the species presence was reduced. On the other hand, with an increase in soil acidity to 7.5%, the species response increased, and as soil acidity was increased to 7.7%, the presence of the species decreased. Also, the presence and growth of the species increased with and increase in soil acidity. The results also indicated that the presence and growth of species increased with an increase in the amount of soil lime to 55, and that the presence of the species decreased with an increase in soil lime. Moreover, as the percentage of the soil's organic carbon increased, the species response and presence increased. Furthermore, the species response and presence increased with an increase in the soil's nitrogen percentage. Also, as the percentage of uncovered soil (bare soil) increased to 55, the species response increased, and as the bare soil increased, the presence of the species decreased.

The results of conventional adaptive classification showed that seven factors, including the percentage of neutralizing material, altitude, percentage of bare soil, electrical conductivity, soil saturation, litter percentage, and soil silt percentage were the main factors which influenced the distribution of Taverniera spartea. Applying the generalized collective model with Poisson error distribution for each environmental variable showed that soil lime percentage, clay percentage, acidity, soil organic carbon content, soil nitrogen, and bare soil percentage has a significant influence at the level of 0.05%. on the species yield.The study also examined the role of the presence and yield of Taverniera spartea as a valuable rangeland species in forage production, soil and water conservation using environmental factors. It could be said that to rehabilitate the degraded rangeland areas with the required conditions for the establishment of this Taverniera spartea, the species should be planted according to its ecological needs. At the same time, proper and optimal use of the species in rangeland and suitable habitats reduces the loss of capital and time.

In order to investigate the preference value of plants, this study was conducted in Sirik rangeland in Hormozgan province. To determine the preferred value in this region, two methods of timing and production and consumption of plant species were used. The results of analysis of variance of the preferred value in both timing methods (using a video camera) and the operating percentage yielded the same results. Because in both methods, there was no statistically significant difference at the level of 5% between the years and months of the study and only a significant difference between species. In the chronological method, Sphaerocoma aucheri with statistically assigned the highest mean (29.8%) along with annuals with an average (28.9%) were placed in a class statistically, followed by Moltkiopsis ciliata and Cenchrus pennisetoformis 9.3 and 7.8, respectively. In the method of exploitation percentage, the highest exploitation percentage was Cenchrus pennisetoformis with 52.9%, although with Heliotropium bacciferum with 49.6%, Moltkiopsis ciliata with 45.8%, Sphaerocoma aucheri with 44.6% and Cyprus conglomeratus with 44.5% were in a group. In the Sirik region, Sphaerocoma aucheri was one of the high density and high consumption species and Cenchrus pennisetoformis was the low density and high consumption species. Sphaerocoma aucheri was in the first place in terms of preference value, but it should be noted that livestock tends to graze more than annuals at the beginning of the growing season and at the end of the growing season with drying or seeding of grasses, annuals are received less attention.

Drought is one of the most important natural disasters that threaten human societies. Various indices are employed for drought monitoring. The purpose of this study is to evaluate and monitor the drought phenomenon based on two indicators of standardized precipitation (SPI) and standardized precipitation-evapotranspiration (SPEI) in Hormozgan province. SPI index is calculated only based on precipitation data, and SPEI index is calculated based on precipitation data and evapotranspiration potential values Torrent White method) of drought. For this study, monthly precipitation data and average monthly temperature data of five synoptic stations of Bandar Abbas, Bandar Lengeh, Hajiabad, Minab, and Bandar Jask for a period of 30 years (1988-2017) were used. The results showed that although the values of SPI and SPEI index were correlated, SPEI index was more sensitive to drought and faster response to it and showed longer dry and wet periods. Comparison of SPI index values of different climate stations revealed no significant difference between their SPI values. It was also found that there was no considerable difference between SPEI index values for selected stations. Finally, the findings showed that the spatial distribution of the SPI index was more uniform compared to that of the SPEI index in Hormozgan province.

This study aimed to compare the effects of roots and leaves of Prosopis juliflora (SW) DC at different concentrations on emergence, vigor, radicle, and plumule length of two species of Taverniera spartea (Burm. F.) DC. and Pennisetum divisum (Forssk. Ex JF Gmel.) Henrard in Hormozgan province, Iran. After grounding the leaves and bark of Prosopis juliflora and mixing it with the soil of Prosopis juliflora habitat (0, 20, 40, 60, and 80 g of each organ per kg of soil), 15 seeds of Pennisetum divisum and Taverniera spartea species with four replications were cultivated in the soil, and the desired variables were recorded and analyzed using GLM statistical analysis. The results showed that vigor, radicle, and plumule length of Taverniera spartea species in soil associated with bark was 10.77, 3.47, and 3.63 cm, and in Pennisetum divisum species were 5.7, 4.36, and 4.15 cm that was higher than in the leaves. Also, seed vigor, plumule length in Taverniera spartea species, and seed vigor, radicle, and plumule length in Pennisetum divisum species had the lowest values in 8% treatment. The interaction effects of concentration×organ also showed that the leaf extraction had significant decreasing effects on seed vigor, plumule length in both species, and radicle length in Pennisetum divisum species. Also, the emergence percentage in Pennisetum divisum species (18.33%) was the highest in the control treatment. The results showed that Prosopis juliflora has inhibitory effects on rangeland species, so the selection of this species for afforestation in desert areas should be done more sensitively and the use of native species (Ziziphus spina christi, Prosopis cineraria, and Acacia oerfota) should be prioritized.

The appropriate and permissible utilization of the rangeland causes stability, prevention of degradation, stability of high quality plants and improvement of its condition. Appropriate grazing intensity causes continuous and economic use in rangeland and to achieve stability and continuity of production in rangelands and determine the most appropriate level of exploitation, study the effect of different harvest intensities on forage production of three important species of Cenchrus pennisetiformis, Panicum turgidum and Sphaerocoma aucheri in Sirik region of Hormozgan province since 2006 for four years. Experimental treatments included four harvest intensities of 25, 50 and 75% and control (without harvest). In each treatment, 10 rootstocks of the species were considered as replicates, which were evaluated on each of the dependent variables. The results were analyzed in SAS software. The results showed that different harvest intensities, years and months studied and their interactions in species are very significant. Harvest intensity affected the amount of green forage and species height and all treatments were significantly different from the control. Therefore, an allowable harvest of up to 50% can be suggested for the above species.

To determine the nutritional value of five halophytes, Aeluropus lagopoides, Atriplex leucoclada, Desmostachya bipinnata, Halopyrum mucronatum, and Halocnemum strobilaceum, this study was conducted in 2016 in Hormozgan province. Plant samples were collected in three phenological stages including vegetative growth, flowering and seeding, and eight forage quality traits (CP, DMD, WSC, ADF, CF, NDF, ME and ash percentage were measured. Data analysis of variance was performed as a factorial experiment in a completely randomized design and the means were compared with Duncan's multiple rsnge test in SPSS software. The results showed that the effect of species for all traits, the effect of phenological growth stages for four traits: (CP), (DMD), (ash), and (ME), and the interaction effect of species and phenological growth stage were significant for all quality indicators except (WSC). The highest forage quality was obtained at vegetative growth stage and Atriplex leucoclada was superior to other halophytes in terms of nutritional value. Therefore, the use of this native species instead of non-native ones of this genus is recommended in rangeland improvement of areas with similar rainfall.

Being located in an arid and semi-arid region, Iran has always faced with limited water resources. As groundwater extraction has now exceeded the permitted limits all over Iran and the country faces considerable constraints in developing groundwater resources, severe water crisis looms large in the horizon. In this regard, a quick solution should be considered to supply water from non-conventional water resources (brackish and saline waters, rainwater harvesting, cloud seeding, etc.). Therefore, this study sought to investigate the status of water in Fatuyeh-Todroyeh plain in Bastak city, Hormozgan province, and the possibility of supplying water from unconventional resources, especially the brackish and saline waters, for agricultural purposes.

In the first step, the required maps of the study area including the groundwater electrical conductivity (EC) map were prepared, using ArcGIS software. Then, chemical analysis of the Fatuyeh-Todroyeh aquifer’s water quality was performed by AqQA software on the data gathered through three rounds of sampling from the wells, followed by the calculation of water quality index (WQI). In the next step, the the study plain’s hydro-climatic balance was measured via Budyko conceptual model, taking changes in storage into account. Then, to investigate the economic justification of using inland water desalination plants in the region, the cost-benefit ratio of the cucumber greenhouse cultivation, and the investment’s return rate for the installation of water desalination plants and greenhouse sites were calculated. Finally, having decided on appropriate criteria and options, the hierarchical analysis method (AHP) was applied for comparing different management options and offering the best plan for supplying unconventional water resources for the agricultural, drinking, and industrial sectors of the study region, using Expert Choice software.

The results of water resources quality surveillance showed that the Fatuyeh-Todroyeh plain’s groundwater samples ranged from acceptable to completely unpleasant in terms of drinkability according to Schuler diagram, and that its dominant water type was something between chloride and sulfate according to Piper diagram. Moreover, based on Wilcox diagram, the suitability of groundwater resources for irrigation purposes ranged from doubtful to unsuitable. In other words, there were no groundwater resources in the plain with low and medium EC and low to high SAR risks. Furthermore, the highest coefficient of variation belonged to sodium ion which was equal to 0.67 over the study plain. In general, according to WQI quality index, 75% of the water in Fatuyeh-Todroyeh plain’s wells have very poor quality, being inappropriate for agriculture and drinking.
Calculations of the plain’s water balance indicated that the decline in storage changes was 2.4 million cubic meters annually, making the development and extraction of groundwater impossible. The results of the investigation of the economic justification revealed that according to the cost-benefit ratio which was found to be greater than one in all years of a five-year period and the investment’s return rate which was greater than the current bank interest rate, the construction of inland water desalination plant and the establishment of greenhouses in the study region is economically justified. The results of AHP calculations suggested that based on the criteria set for unconventional water management in the agricultural sector of the study area, implementing the optimal cultivation pattern was the best choice in this regard, followed by the option of constructing a desalination plant. As for drinking purposes, the highest score belonged to the option of constructing water desalination plants, and for the industrial purposes, the highest score related to the option of prohibiting wastewater discharge into the river protection area.

Conclusion

the study’s findings showed that there were no facilities for the development of groundwater extraction in the region. However, constructing a dam in a suitable place, controlling the rainwater runoff (which is of very poor quality), and desalinating the stored water by a desalination system could help use the plain water acquired for drinking and agricultural purposes in Fatuyeh-Todroyeh plain

As a hazardous complex climate condition, drought has affected many parts of the world, and in times when its duration is prolonged, its damage would be tremendous, affecting various sectors such as agriculture, environment, economic, social, etc. Due to the wide range of this phenomenonchr('39')s effects on all ecosystems, especially in arid and semiarid regions, continuous monitoring of drought is particularly important. Vegetation and its products are among the most significant parameters affected by this destructive phenomenon. Observation of such harmful effects can be done using remote sensing science. In recent years, this science has played a significant role in managing and monitoring drought, vegetation, and their interactions by increasing sampling points, widening the coverage area, improving temporal resolution, lowering costs, and applying regular and higher spatial resolution. Considering the importance and necessity of this issue, this study set out to investigate and monitor drought indices (SPEI, SPI), vegetation index (NDVI), and these indiceschr('39') interactions from 2000 to 2016 in Hormozgan province, Iran.

To study meteorological drought and potential evapotranspiration, the required data concerning the monthly rainfall and temperature of 164 rain-gauge stations in the region were collected. Then, the homogeneity test was applied to all stations. Statistical deficiencies were reconstructed for the data, and finally, the annual SPI values were calculated using MATLAB software. Kriging geostatistics was used to map the SPI drought. Due to the availability of satellite images for 2000-2016, a drought map was prepared for this period. The NDVI index obtained from the Modis satellite images (MOD13A2) was also used to study the vegetation. Finally, to investigate the effects of meteorological drought and potential evapotranspiration on vegetation, the average NDVI and drought index was calculated for each year, and the severe effects of drought on vegetation were examined. Moreover, the correlation between vegetation and drought was studied through the Pearson correlation coefficient.

According to the results of the study, the highest values of SPI and SPEI were found in the years 2009, 2014, 2012, and 2011, respectively. NDVI and annual rainfallchr('39')s changing trend indicated that these indiceschr('39') mean values were significant at 95 levels over the 17 years, showing an increasing trend. The trend of temperature, SPEI, and SPI changes was decreasing during this time interval. Also, the vegetation index peak was in accordance with the highest rainfall value in this time period. In other words, the highest rainfall occurred in 2005 in this region. The vegetation index showed the highest increase this year, suggesting that vegetation was affected by rainfall fluctuations in the region. Based on the results of the Pearson correlation coefficient between meteorological drought, evapotranspiration potential, NDVI vegetation index, precipitation parameter, and temperature at a 12-month time-scale, the highest correlation was reported between SPI index and precipitation, which was equal to 0.99, and the lowest correlation was found between temperature and SPEI, being 0.48. Moreover, this correlation coefficient analysis showed a high correlation between the meteorological drought index and NDVI vegetation index at 95% level in the study area. This correlation was reported as 0.792. The correlation between SPEI and NDVI was also reported as 0.797, indicating that with an increase in precipitation rate, the NDVI increased.

It could be concluded that, depending on the prevailing conditions of the area, the extent, time, and type of rainfall affect the amount of vegetation. Therefore, studying and identifying vegetation in each area could lead to the discovery of each regionchr('39')s conditions and the vulnerability status of the area. Any reduction in the effects of drought on these fragile and sensitive ecosystems requires careful planning according to each regionchr('39')s conditions. Planners and relevant authorities should take appropriate measures to improve the irrigation system, reduce evaporation, enhance the crop system, mitigate the damages caused by drought, and get the ecosystem adapted to climate conditions. Moreover, this study used Modis images with a kilometerchr('39')s pixel size. For a closer look at the vegetation index, satellite images with smaller pixel sizes, such as Landsat ones, could also be used to increase spatial accuracy. Finally, a more detailed study is recommended to investigate the effects of drought on vegetation in different land-uses.

Utilization of saline lands with the aim of producing lignocellulosic biomass, which has no nutritional value and can be converted to ethanol and at the same time has no effect on human food production, seems necessary. Halophytes and salt-tolerant plants that produce high biomass using saline resources (saline water and soil) can be considered as an important alternative in this regard. For this purpose, this study with the aim of investigation of ethanol producing potential of five species of Auluropus lagopoides, Atriplex leucoclada, Desmostachya bipinata, Halopyrum mucronatum and Halocnemum strobilaceum was conducted in Hormozgan province in 2016. Plant samples were collected at three phenological (vegetative, flowering and seeding) stages from two saline lands in Zaminsang and Sirik, Hormozgan province and three parameters of lignin, hemicellulose and cellulose were measured. Data analysis of variance was performed as a factorial experiment  based on the completely randomized design with three replications and comparison of means with Duncan's multiple range test in SPSS-14 software. The results showed that Halopyrum mucronatum had the potential to produce ethanol in all three vegetative stages. Halocnemum strobilaceum had the potential for ethanol production only at the vegetative growth stage and Aeluropus lagopoides and Desmostachya bipinata had the potential for ethanol production only at the seed ripening stage.

Helianthemum lippii and Tavernieracuneifoliais are the most important broadleaf  plants of Hormozgan province, Iran. To investigate the establishment of these species, this study was conducted at the Watershed Management and Natural Resources Station of Dehgin (Hormozgan province) from November 2014 for three years. The three methods of seeding in farrow, pitting, and crescent catchment were studied in a randomized complete block design with three replications in SAS software. The results showed that there was a statistically significant difference between experimental structures, plant species used, and also the interaction of structure and species. A statistically significant difference was recorded for Helianthemum lippii and Taverniera cuneifolia at the level of 5%, for the crescent catchment structures, pitting, and contour-furrow at the level of 1%, and also for the interaction of structure and species at the level of 1%.  The highest percentage of species establishment was in the crescent catchment structure with 27.1% and the lowest was related to the pitting structure with 3.2%. Investigation of the interaction of structure and species in the rate of species establishement in different structures showed that the highest percentage of establishement was related to Taverniera cuneifolia with 31.2% in the crescent-shaped structure, after that, the highest percentage of establishment was related to Helianthemum lippii with 22.9% in the same structure. The lowest establishment was related to the contour-furrow structure with 2.1% for Taverniera cuneifolia and pitting structure with 2.1% for Helianthemum lippii. Based on the results of the present study, it is suggested that to successfully implement rangeland cultivation projects with Lippii Helianthemum and Taverniera cuneifolia in similar climates of Hormozgan province, the mentioned species should be planted in crescent-shaped structures.

The construction of underground dams for storing groundwater resources can be one of the suitable solutions for the supply and development of water resources. If these dams are properly implemented, can be stored water in wet season and used in dry periods. This study was conducted to select appropriate sites for the construction of underground dams in the Keryan-Minab watershed in Hormozgan province in three stages in a hierarchical process. In the first step, the Boolean algorithm was used to remove inappropriate regions. In the second stage, using field views, suitable sites from potential areas were determined and confirmed. Subsequently, the SWAT model was used to simulate this flow due to the importance of subsurface flow in locating dams, which was used to calibrate and validate the flow from observation data of the station. This verification was approved by the 61 coefficient and the Nash-Sutcliff coefficient was 0.62. The final stage was prioritized using multi-criteria decision making models (TOPSIS and VIKOR) and based on the 10 criteria of suitable sites. The results showed that in the tops method, Bondar Dam was ranked first with a score of 0.73779 and Kharu dam with a score of 0.1069 in the least priority. The results of the VIKOR method, Senderek dam with the Q index of 0.94 ranked first and Eslamabad dam with a score of 0.16 in the least priority.