Application Of River Ware Model In Urumqi River Basin

The Riverware Decision Support System is an universal modeling system for river, reservoir and the operation and management of hydropower station, and to model the river flow process, reservoir operation, consumptive water use, diversion channels, process of shallow groundwater and surface water interactions, operation of various hydraulic structures. It is mainly used for alliance scheduling and optimization scheduling of reservoir groups, flood prediction, flood simulation, water quality simulation and environmental & ecological impact evaluation. Based on the operation platform and the results from RiverWare Model, decision makers’ use can solve the random problems of watershed environment and water resources.In this paper, by using the method of field survey, GIS spatial analysis, and hydro statistics with the assessment of ArcGIS, Auto cad, Google earth, finished the digitalization and visualization of water system distribution, water use facilities, the location of ground and underground water, crop distribution and so that provide the Riverware model with important input data for model establishment and parameters calibration. After finishing digitalization, Riverware model is established by using the observed data range of 2005/31/01 to 2012/31/12 from Yuejinqiao hydro station, Yingxiongqiao hydro station and Wulabo reservoir. The structure of Riverware model is strictly coinciding with the actual distribution of ware system in the basin and model and the model is established on a daily time step. After model calibration, three model accuracy criteria, Coefficient of determination R2, mean relative error E, and volume difference Dv, are used for model accuracy test. The results show that the Yingxiong bridge model results fit fairly well with observed runoff, R2 is 0.90, and the average relative error of 0.128, this is because the mountains are almost nonexistent water cycle simple, and no large number of water users. Observed and simulated values of Wolabo reservoir are consistent, and R2 is 0.39, root mean square error is-0.54, the is because the great number of water users, complicated water allocation and division, vast amount of evaporation in the area located between Yingxiong bridge to Wolabo reservoir, and the established model is vulnerable to interference of the factors of uncertainty. Hence, it can be concluded that Riverware model is well established in Urumqi river basin and the model is of practical and technical application in the water recourses management.