Watershed Hydrological Model HSPF Based on BASINS and the Uncertainty Analysis

Water is an important guarantee of sustaining life and social economic development. However, at present, our country is faced with more and more problems about water resources, such as water shortage and water pollution. Thus, it brings a chance to hydrological model for research, development and application, and it is also a huge challenge. HSPF model belongs to the distributed hydrological model, based on the meteorological and hydrological data, it can mainly simulate the water quality of natural water system and be used to predict the long-term effects that human activities on water, sand and agricultural chemicals, such as soil erosion and non-point source pollution. This paper mainly introduces the concept of hydrological model, watershed hydrological model, the software BASINS, the watershed hydrological model HSPF and the process mechanism of model building that include data processing and model testing, at the same time, it also introduces the calibration method of model certainty, including the manual adjusting parameter and the calibration standard. Finally, the article also discusses the problems about the uncertainty of the model, and gives some suggestions.