List of Articles hydrological parameters

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  1 - Investigating effective parameters of surface flow and water resources spatial zoning in central Zagross, Iran
  Nasser Shamskia Hossein Sedghi Mehrdad Esfandyari
  Various parameters, such as rainfall, region height, evaporation rate, temperature, climate factors, drainage, topography and geology of the basin effect runoff in watersheds. Due to the interrelation of some of the mentioned parameters, their quality and effect on runo More

  Various parameters, such as rainfall, region height, evaporation rate, temperature, climate factors, drainage, topography and geology of the basin effect runoff in watersheds. Due to the interrelation of some of the mentioned parameters, their quality and effect on runoff may be different for each region. This paper presents a statistic assessment of the parameters that are effective on runoff and spatial zoning of surface water resources in central Zagross, west of Iran. The results showed a relationship between logarithmic distribution of surface runoff, and temperature and height variables with a 0.795 - 0.851 R2 coefficient of determination, applying statistical analysis and multi-variable regression method for the parameters. Considering 80 selected stations of the studying area with a correlation of 0.923, the runoff distribution in the form of discharge logarithm related to rain logarithm and height variable with confidence level of 95% showed meaningful and acceptable relation .The zoning plan was prepared through ArcGIS software on the basis of weighting effect index of each variable. The analysis of factors which affect runoff formation, and also analysis of the effect of the mentioned variables on preparing zoning plan showed tremendous movement of potentially appropriate water resources regions from south towards north and east of the studying area. Furthermore, there was approximate correspondence between hydrological parameters and determination of suitable water resources location, and statistic multi-variable regression analysis, logistic and weighting index determination of variables methods. Manuscript profile
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  2 - Performance of Revised Gash Model for Estimating Rainfall Interception in a Robinia pseudoacacia plantation during the leafed and leafless periods
  Sina Ziaye Shendershami Ameneh Mianabadi Seyed Mohammad Moein Sadeghi
  10.30495/jest.2022.60309.5368
  Background and Objectives: Therefore, this study aimed to evaluate the revised Gash model in estimating interception by a Robinia pseudoacacia (L.) stand during the leafed and leafless periods in Chitgar Forest Park. Material and Methodology: A circular plot with an ar More

  Background and Objectives: Therefore, this study aimed to evaluate the revised Gash model in estimating interception by a Robinia pseudoacacia (L.) stand during the leafed and leafless periods in Chitgar Forest Park. Material and Methodology: A circular plot with an area of 0.5 ha in Chitgar Forest Park was selected and rainfall, throughfall, and stemflow were measured for two years (from 22 December 2013 to 21 December 2015). Then, the amounts of canopy and trunks ecohydrological parameters were calculated, and finally, the efficiency of the revised Gash model for estimating interception was evaluated. Findings: In this study, the mean amount of rainfall interception in the leafed period (12.7%) was significantly higher than the leafless period (9.7%). The determination coefficient (R2) value between the estimated interception values and the measured in the leafless period was higher than in the leafed period. Based on all model evaluation metrics, the performance of the revised Gash model in estimating interception in the leafless period was better than in the leafed period. Discussion and Conclusion: Based on the findings of this study, the Revised Gash model showed good ability in estimating interception during the leafless period, and a probable reason for the high estimation error of the model in the leafed period is the lack of direct measurement of the canopy percentage parameter. Accurately determining the amount of interception, as a canopy water loss, contributes significantly to the planning and decision-making process of forest managers and water resources managers for selecting the appropriate species for plantations. Manuscript profile