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题名: Development of an objective-oriented groundwater model for conjunctive-use planning of surface water and groundwater
作者: Yung-Chia Chiu;Ne-Zheng Sun;Tracy Nishikawa;William W.-G. Yeh
贡献者: NTOU:Institute of Applied Geosciences
关键词: inverse problem;parameter structure identification;model calibration
日期: 2009-07
上传时间: 2012-06-15T07:40:49Z
摘要: abstract:In this paper we construct an objective-oriented model for conjunctive-use planning of surface water and groundwater for the Warren groundwater basin in southern California. The goal of conjunctive-use planning is to decrease high-nitrate concentration while maintaining groundwater levels at desired elevations and meeting water demand. We formulate a management problem that minimizes the total cost over the proper choices of the time-varying pumping and recharge rates at prespecified wells and surface ponds. To make the solution of the management problem reliable, we must have an accurate simulation model to predict groundwater level and nitrate concentration distributions under different management alternatives. The objective-oriented model construction approach seeks a representative parameter that has the simplest structure and requires the minimum data for identification but can produce reliable results for a given model application. With the data from the Warren groundwater basin, we show how to incorporate management objectives into the construction of an objective-oriented model, identify the parameter structure and its corresponding parameter values, solve the generalized inverse problem effectively by finding the worst-case parameter (WCP), evaluate the sufficiency of existing data, and find a robust experiment design when the existing data are insufficient. Results of this case study show that the presented methodology is useful in practice because (1) data sufficiency can be judged before conducting actual field experiments and (2) the identified WCP drastically reduces the computation time for constructing an objective-oriented model.
關聯: 45, W00B17
显示于类别:[應用地球科學研究所] 期刊論文


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