جستجوی مقالات مرتبط با کلیدواژه « urban park » در نشریات گروه « محیط زیست »

The urban green space, with its food resources, water, and shelter, can support a significant number of birds. For this reason, studying the number and species of birds in urban parks can be effective in monitoring the health of ecosystems. To study the number and species of birds in the parks of Zayandeh-Rud, two transects with an approximate length of 4.5 km along the studied parks were established in the spring 2019. The distance between the sampling points on each transect was 50 meters, the number of sampling points was 50 points and the total of 100 sampling points or stations was designed. The number and pattern of bird distribution was performed using the point counting method every 5 minutes during each study, and all observed birds were recorded up to 50 m away. Using binoculars as well as sound tracking, existing birds were recorded and identified. The total number of observed species is 41, in which Passeriformes with 31 species have the highest frequency among other orders. All three Simpson, Shannon Wiener and Brillouin indices in Najwan Park have the highest values. The numbers of tree species in Nazhvan Park (756 trees) is in the second place after Saadi Park (1092 trees). The moderate weather, the distance from urban stresses and noise pollution can be considered as the reasons for the existence of high species diversity.

Urban parks are considered as public spaces and the basic rights of citizens; paying attention to opinions and wishes of citizens is a necessity in their satisfaction of environmental factors. The purpose of this study is to investigate the security factor as one of the environmental quality factors from the user’s point of view in urban parks, which can guarantee the citizens' satisfaction in urban spaces using.

This study is an experimental research with functional goal and a survey method with gathering data by distributing questionnaire in urban parks. In this study security indicators are based on the CPTED theory. The number of statistical samples was 175 (users over 15 years old).Data analysis has been performed using SPSS and multiple regression analysis has been used to predict the contribution of each sub-indicators in security satisfaction.

The results of the partial correlation test between the factors with considering other factors indicate a significant relationship between security and aesthetic factors, meaning and aggregation, and no significant relationship between security and structural and physical factors ,and behavior patterns. The aggregation factor has the strongest relatinship to security. Also, the indicators presented in the security factor are affected by different degrees. The gender variable has no significant difference in the mean of security, but the variables of age, marital status, educational level and occupational status have affected average satisfaction in security. So that people with a higher average age, married, graduate and house wife have higher expectations of security than other groups in their subset.

The results of this study can help managers, planners and urban designers in implementing appropriate models to create safe urban parks that meet the preferences of users. So they can implement spaces according to the needs of users by considering the wishes and priorities of each group.

The role of trees in reducing the amount of heavy metals in the air and thus reducing the environmental risks cannot be denied. In the present study, distribution of cadmium, nickel, lead and zinc metals was investigated in leaf and skin of Plane tree, Ash and Eldarica pine in urban parks of Hamadan. For this purpose, in the different parks of Hamadan, samples were taken from the skin and leaves of the trees. After transferring the samples to the laboratory and digesting them, the concentration of metals was measured by atomic absorption. Comparison of the concentration of heavy metals in the leaves and the skin of the tree species showed that the Plane trees have a higher ability to absorb of heavy metals than the Ash and Eldarica pine trees. The zinc concentration in the skin and the leaves of the trees was higher than the concentrations of other elements. Comparison of the concentrations of the elements in the skin and the leaves of the trees with global standards showed that the concentration of cadmium in the skin and leaves of trees was higher than the standard limit and the concentration of nickel in the skin of the two Plane tree and Ash species was higher than the standard limit Which indicates the pollution of the urban environment. Correlation between the concentration of heavy elements in the skin and the leaves of the trees showed that there was a significant positive correlation between cadmium concentrations in leaves and skin of Plane tree and Eldarica pine trees (P <0.05). In general, the comparison of heavy metal concentrations in the leaf and skin of the tree species showed that Plant tree and Ash were very effective in absorbing heavy metals from their surroundings than Eldarica pine.

Urban parks have an important role in human society because of direct communication with people and are one of the indicators of developing new communities. The existence of security and suitability of the facilities required in urban parks will sustain sustainable development and increase the presence of more people. as a result, improved quality of life and societal security increases. The aim of this study was to assess social security in Mellat Park in the city of Zahedan in order to sustainable development as a descriptive analysis with the preparation and distribution of the questionnaire. Data processing was performed using Spearman's statistical test in the SPSS software and with the acquisition of Cronbach's alpha coefficient of 0.761, the validity of the questionnaire. The results show there is a positive and significant correlation coefficient(P<0.05), between societal security and the selected monitoring indicators(0.57), quality(0.77) and activity in Park(0.82) and the average score of societal security2.61 and standard deviation of this variable 0.45 is that social security is evaluated in this medium.

Considering the importance of urban green space and their inseparability from the city's complex, in order to minimize damage to life, financial and adverse effects and to create security in the parks, necessity to adopt the policies and persistent solution is binding. Therefore, in this research, health, safety and environmental management in Ahvaz urban parks was reviewed and management solutions were proposed in order to improve current situation.
In this research, at first 6 parks from the different kinds of parks based on the number of user, equipment, land measurement, type of parks, proximity to city places have selected to study, Then collection of criteria and indexes for all of these criteria identified accoding to the Delphi method and asking from experts have scored from 1-10, and after removing least important indexes have specified the identified criteria and indexes. Then, by using of hierarchical analysis process technique base on 10 people expert's viewpoint based on binary comparisons and by using of expert's questionnaire in hourly scale have preferred the main criteria and the identified indexes for health, safety and environment management, then used TOPSIS method for choosing the best option of health, safety and environmental criteria and also the best park.
Results show that scores of safeties indicator of parks with 0.526 point is lesser than environment indicator score with 0.656 and more than health score with 0.403. Also, the result of ranking of studied parks indicate that Island Park in term of health, safety and environmental condition is the best and State park allocated the lowest point. Thus, collection of standards and indexes for all of these standards identified and based on asking from experts and determining their importance degree had specified the identified standards and indexes.
since the giving priority to health, safety of urban parks according to that parks have high portion in the citizen's collective life, is inevitable necessity and according to valuating results of Ahvaz's urban parks situation base on health, safety and environment standards, it is important to cite that the success of revision programs for making optimum the health condition of urban parks is hided in accompanying and integration three mentioned factors and performing of their integrated management and this means that implementation HSE-MS model may consider successful method.

The citizenry need to do optional and social activities. These activities wont happen unless the demanded public space exists. Function and vitality are indicators of public space's desirability and efficiency. Planning and designing functional spaces for citizenry leads to fulfill a part of urban engineers and city managers responsibility creating spaces for citizenry activities. Park is one of the mentioned spaces. This analytic and practical article is prepared for determination of effectivefactors on efficiency of urban park by emphasizing function and vitality. Documentary and bibliotheca method is used to understand theoretical aspects of this observation and research. Catching citizenry points of views about Ellarbaghi park of Urmia city are made by questionnaires and "Factor Analysis" method and finally mixed them with Excel and Spss software. " Kendall's tau_b and Spearman's rho " correlation analysis" is also used and considered with hypothetical targets of research. Function, tranquility, cleanness, perspective, appropriate management and collectivity of park users are effective factors on efficiency of urban park according to users’ points of view feedback from research circumstances. Examining research hypothesis proves increasing citizenry acquiescence from applicability of various activities in the park as well as functionality of park increase urban park vitality.