Atmospheric aerosols interact with sun light by scattering and absorbing radiation. By changing irradiance of the Earth surface, modifying cloud fractional cover and microphysical properties and a number of other mechanisms, they affect the energy balance, hydrological cycle, and planetary climate [IPCC, 2007]. In many world regions there is a growing impact of aerosols on air quality and human...

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...

Numerical models are being used to simulate the response of hydrological basins to meteorological events both for decision making process in case of severe weather, as well as for the management of water resources and the environment. Nevertheless, it appears increasingly important to understand the possible effects of observed climate changes on the hydrological system, and in order to simulat...