摘要
本文采用有限单元法进行地下水资源评价以解决评价区供水面积大、精度要求高的矛盾。首先根据实际的开采量和长期观测孔的水位资料，校正数学模型，反求有关参数；然后给定开采方案进行未来水头的预测；最后研究地下水资源的合理开发利用问题。利用有限单元法进行水源地或单一含水层的地下水资源评价已被证明是先进的、有效的。本文是对水文地质条件非常复杂的大面积的区域，用有限单元法进行地下水资源评价的一种尝试。
Groundwater is the major water source of Zibo city and provides approximately 70% of total water supplies in this city Therefore, the rational utilization and proper exploitation of groundwater resources is of essential importance for the sustainable development of the city The research area, which covers 5 districts and 1 county, is located in the Zibo syncline basin and belongs to a single hydrogeological unit In this research, the 6 administrative zones above mentioned is simulated as a unity Geological and hydrogeological conditions are quite complex in this area since major aquifers are of fracture karst orientation with different media properties Furthermore, many large scale structural movements occurred in geological history also greatly influenced the characteristics of groundwater flow In previous studies, water balance method was often employed under such conditions However, because some important factors can not be determined accurately, the results are not very convincible Finite Element Method (FEM) is thus employed in this paper to resolve the contradiction between large computational effort and high precision demanding in groundwater resources evaluation of Zibo City First, a simplified conceptual model maintaining key features of the research area is set up through careful study of numerous geological and hydrogeological data and relevant literatures Then, with the well statistics of historical pumping and long term groundwater level observations, a mathematical model based on the conceptual model is constructed and calibrated In the meanwhile, relevant model parameters are also obtained by solving the inverse problem through trial and error approach After that, rectification procedures began with additional observational data The results show that computations and observations match very well at most locations and that the numerical model can be used to forecast groundwater flow field in the future The next step is to predict water head in the future using given pumping plans and other conditions, such as model boundary definition, precipitation series, etc Finally, suggestions on rational development and utilization of groundwater resources in Zibo City are discussed based upon analysis of the model output
出处
《高校地质学报》
CAS
CSCD
1999年第2期211-220,共10页
Geological Journal of China Universities
基金
国家自然科学基金
关键词
地下水资源评价
地下水数学模型
开发利用
groundwater resources evaluation, ground water numerical model, finite element method,fracture karst water
