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

Knowledge of habitat requirements of aquatic animals plays an important role in fisheries and protection programs of aquatic ecosystems. Hence, this study was conducted to investigate the suitability indices of habitat use and habitat suitability index (HSI) of Cyprinion macrostomum in its distribution range, Zab River. A number of environmental variables, including pH, temperature, EC, TDS, elevation, water depth, river width, river slope, velocity, substrate type, and the relative abundance of C. macrostomum at 6 stations and three replications from the downstream to upstream were examined during from the fall of 2021 to the summer of 2022. The results showed that habitat suitability of C. macrostomum is different during four seasons and this species prefers areas with pH in the range 9-10, high temperature, low altitude, low bed slope, medium velocity, and gravel and slate beds without vegetation, and these environmental factors expressed during the four seasons of the year are almost similar. But EC, TDS, river width and water depth factors are distinct in different seasons and it prefers different ranges of these factors during the seasons. In spring and summer preferred the lower width and depth of the river, and in winter and autumn seasons preferred the width greater and depth higher of the water.

The weather forecast data for future planning is very important in the fields of natural and human. Including could be the prediction of droughts and floods, and so on, in which case systematic planning, reduced probable damages. In this study, the effects of climate change on drought conditions North Branch of Zab River catchment located in the South West of Western Azerbaijan province, as the most important river plains of Piranshahr, during the period 2065-2046 using the indicators of drought (DI), SIAP and the Standardized Precipitation Index (SPI) has been paid. Initially daily data output of general circulation models of the atmosphere HADCM3 under the scenario A1B, A2 and B1, by statistical model LARS-WG Version 5, small scale and the ability of LARS-WG in the simulation of past climate (2010-1992) studied for the station simulated. So it, using the precipitation data of drought situation to help mentioned indicators is discussed in annual terms, that the results are conform these indicators proves to identify periods of drought. Considering to periods of drought that occurred in the observation data and results for the period is anticipated, we will see station in Piranshahr, increase the severity and duration of drought in the study area in the coming years.