Hits:

Indexed by:期刊论文

Date of Publication:2012-06-30

Journal:HYDROLOGICAL PROCESSES

Included Journals:SCIE、EI、Scopus

Volume:26

Issue:13

Page Number:1937-1948

ISSN No.:0885-6087

Key Words:hydrological modelling; water flow simulation; SWAT; rain gauges; missing rainfall data recovery; spatial interpolation

Abstract:Watershed areal rainfall estimation, which is one of the most important and fundamental aspects in hydrological forecasting and various kinds of catchment-scale hydrological models, is widely used in the analysis of hydrological regime change, and its precision has a direct influence on the accuracy of hydrological forecasting and hydrological simulation. In China, it is difficult to obtain the watershed areal rainfall estimate with reliable precision and avoid the phenomenon of the same effect of different parameters because of the low density of the rain gauge network. Therefore, a watershed rainfall data recovery approach of improving the precision of watershed areal rainfall estimation is proposed here. This approach is to build new observatories, establish the timespace relations of rainfall between newly built observatories and previously built observatories in a relatively short interval and then recover the rainfall data of newly built observatories prior to their construction through simulating the relations over a longer time. As a result, watershed rainfall information could be elaborated to improve the precision of watershed areal rainfall estimate and avoid the phenomenon of the same effect of different parameters to a certain degree in the process of hydrological simulation. The approach is used in the hydrological simulation of Hali River catchment. In combination with the Soil Water Assessment Tool model, a better result can be obtained in the hydrological simulation. Therefore, the approach can be used in other similar catchments. Copyright (c) 2011 John Wiley & Sons, Ltd.