نتایج جستجو برای: arc cn runoff
تعداد نتایج: 63380 فیلتر نتایج به سال:
The Spreadsheet Tool for the Estimation of Pollutant Load (STEPL) can be used for Total Maximum Daily Load (TMDL) processes, since the model is capable of simulating the impacts of various best management practices (BMPs) and low impact development (LID) practices. The model computes average annual direct runoff using the Soil Conservation Service Curve Number (SCS-CN) method with average rainf...
Thorough understanding of the rainfall-runoff processes that influence watershed hydrological response is important and can be incorporated into the planning and management of watershed resources. Soft computing techniques and inferential statistics were used to assess 2 rainfall-runoff models and their runoff predictive accuracy in this article. The 1954 simplified SCS runoff model was found t...
سیل از جمله مخاطرات ناشی از تغییرات اقلیمی و کاربری اراضی در اکثر نقاط دنیاست که سالانه خسارات بسیار زیادی بر جوامع تحمیل میکند. برای مدیریت و پیشبینی سیل خیزی یک منطقه، تخمین پتانسیل ارتفاع رواناب نقش مهمی دارد؛ در این راستا سازمان حفاظت خاک آمریکا (SCS) یکی از مؤثرترین روش ها را ارائه داده است که برای حوضه های فاقد آمار بسیار مناسب میباشد. مطالعه ی حاضر نیز با هدف محاسبه و تحلیل پتانسی...
The Soil Conservation Service Curve Number runoff model is widely used in runoff prediction and has been incorporated into many software packages for watershed modeling. The Curve Number (CN) is the key parameter in the model, but it is largely dependent on Hydrologic Soil Group (HSG) classifications which may induce aggregation of detailed soil information. However, little attention and effort...
The Soil Conservation Service Curve Number (SCS-CN) method is widely used for predicting direct runoff volume for a given rainfall event. The applicability of the SCSCN method and the runoff generation mechanism were thoroughly analysed in a Mediterranean experimental watershed in Hyderabad. The region is characterized by a Mediterranean semi-arid climate. A detailed land cover and soil survey ...
Surface runoff and sediment transport in ̄uence soil quality and the quality of receiving waters. Simulation models are useful tools to describe drainage behavior and sediment yield to develop management strategies for agricultural waters. The objective of this study was to investigate the performance of the Agricultural Non-Point Source Pollution Model (AGNPS) and modi®ed versions comparing mea...
The purpose of this study is to accurately measure the watershed potential for constructing rainwater harvesting structures. To carry out this research, the DEM digital-elevation model layer was used to prepare slope, hydrological soil groups and land use maps in the Arc GIS 10.3 software. The drainage density map was prepared by combining the DEM layer, topographic map, drainage density and hy...
Retention and Curve Number Variability in a Small Agricultural Catchment: The Probabilistic Approach
The variability of the curve number (CN ) and the retention parameter (S) of the Soil Conservation Service (SCS)-CN method in a small agricultural, lowland watershed (23.4 km2 to the gauging station) in central Poland has been assessed using the probabilistic approach: distribution fitting and confidence intervals (CIs). Empirical CNs and Ss were computed directly from recorded rainfall depths ...
the major problem in the assessment of relationships between rainfall and runoff occurs when a study is carried out in ungauged watersheds in the absence of hydro-climatic data. this study aims to evaluate the applicability of natural resources conservation service-curve number (nrcs-cn) method together with gis in estimating runoff depth in a mountainous watershed. the study was carried out in...
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