runoff simulation is a vital issue in water resource planning and management. various models with different levels of accuracy and precision are developed for this purpose considering various prediction time scales. in this paper, two models of ihacres (identification of unit hydrographs and component flows from rainfall, evaporation and streamflow data) and ann (artificial neural network) mode...

abstract major of hydrological systems are very complicated and it is not possible to understand them completely, therefore simplification is necessary to understand or control of a part of the system behavior such as water balance relationships. hydrological models are simple structure of complicated systems in water cycle in the nature. the first goal of a hydrological model is function predi...

climate change is one of the most important problems in the present century. so assessing and prediction of future changes is important on water resources and so important for economics and socio-economic consequences. the purpose of this research is assessing the effects of climate change on surface runoff volumes under the scenarios: a1b, a2 and b1 using hadcm3 general circulation model and i...

Abstract In this study, two models of Random Forest and copula-based simulation were used to evaluate the accuracy efficiency IHACRES rainfall-runoff model in simulating daily discharge Siminehroud River south Lake Urmia basin, Iran. A trivariate was created using discharge, rainfall temperature data on a scale period 1992–2018. Vine family their conditional densities implement model. By calibr...

Rainfall–runoff models are not perfect, and the suitability of a model structure depends on catchment characteristics data. It is important to investigate pros cons rainfall–runoff improve both its high- low-flow simulation. The production routing components GR4J IHACRES were combined create two new models. Specifically, GR_IH combination store (vice versa in IH_GR model). performances compared...

arid and semi-arid regions of the world are confronted with limited water resources. a large part of iran is arid and semi-arid and rainfall in arid and semi-arid regions is typically meager, irregular and highly variable. this irregularity affects the hydrological cycle and water resources. investigating the hydrology of the arid and semi arid regions is essential to know this environment and ...