The Study Of WRF+DHSVM Snowmelt Runoff Forecasting Model

Coupling atmospheric and hydrologic models is an important method for hydrogeology technicians to stimulate and forecast hydrological processes, which not only lengthens the effective forecast time, but also improves stimulation and predication of atmospheric model by offering a scientific land surface scheme. Research on coupling atmospheric and hydrology has become an important issue in both hydrology and meteorology.This article makes a explore to meso-microscale snowmelt runoff forecasted model combing closely practical application, which is based on the newest development of atmospheric hydrology, material content include:The limited-region 24-hour Numeric Weather Forecasting System is established by using the new generation atmospheric model system WRF with the initial fields and lateral boundaries provided by the T213 L31. The weather predictions accord with observations on the whole, has got a good effect.This paper got a lot of required spatial land cover input data and parameters of DHSVM distributed hydrological model based on"3S"technology, and running the model successfully on Linux system.A 24-hoursnowmelt runoff-forecasting model is put forward through using forecasted meteorological fields to drive the DHSVM model. The simulated data shows good agreement with the monitoring data, and the average relative error of the maximum runoff simulation result is below 15%. The method offers useful reference for hydrological forecasting and water resources management in the areas without data or data missing.