| 基于数值模拟的天津市地下水资源均衡分析及压采方案制定 |
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| 作者单位： | ;1.天津农学院水利工程学院;2.天津市水文水资源勘测管理中心 |
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| 摘 要： | 【目的】在深层地下水超采严重地区,分层组进行深层地下水资源均衡分析,合理开发利用地下水资源。【方法】以天津市平原区为研究区,将含水层结构概化成Ⅰ～Ⅴ共5个含水层组,分层组概化边界条件、进行水文地质参数分区,整理源汇项、蒸发量、各含水层组分乡镇开采量和观测孔水位数据,在Visual Modflow平台建立了地下水流数值模型。通过对开采量进行调参、反演,完成模型识别与验证。据此进行深层各层组地下水均衡分析,计算地下水蓄变量,制定了分层组压采方案。【结果】末刻第Ⅱ～Ⅴ含水层组的模拟流场和观测流场分布一致,观测孔模拟水头和实测水头相关系数分别为0.961、0.968、0.951、0.960,典型观测孔动态水位变化过程拟合较好。2013—2015年,深层各层组地下水蓄变量分别为-12 499.3×10~4、-12 055.7×10~4、-9 257.81×10~4m~3,处于超采状态。压采方案下,各含水层组压采量分别为15 862.98×10~4、4 961.24×10~4、1 414.97×10~4、2 469.38×10~4m~3,2020年、2030年深层地下水的蓄变量分别为1.09×108m~3和1.05×108m~3。【结论】模拟结果与天津市深层地下水实际情况相符。
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| 关 键 词： | 地下水 模拟 水资源 均衡分析 压采方案 |
Deep Groundwater Equilibrium Analysis and Exploitation Contorl Plansin Tianjin Plain |
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| Institution: | ,College of Hydraulic Engineering,Tianjin Agricultural University,Hydrology and Water Resources Survey and Management Center of Tianjin City |
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| Abstract: | 【Objective】Equilibrium analysis of deep groundwater is an important basic work for reasonable development of groundwater resource.【Method】The multi-layer bearing beds structure in Tianjin Plain was divided into five layers. Based on generalized boundary conditions, hydrogeologicalparameter zones, and source term, exploitation quantity of each layer in each town, evaporation, and observation well data, using visual modflow, deep groundwater flow distribution in Tianjin plain was simulated and established. At the end of simulation period, the simulation and measured flow field were in consistence.【Result】The correlation coefficient of layer Ⅱ～Ⅴ are0.961, 0.968, 0.951, 0.960, respectively. The dynamic change of groundwater level of typical observation well fit well. Then water resources equilibrium analysis was conducted. In 2013—2015,storage change of deep groundwater are-12 499.3×10~4、-12 055.7×10~4、-9 257.81×10~4 m~3, respectively.【Conclusion】Deep groundwater of Tianjin Plain is still in an over-explored state, which is consistent with the actual condition. |
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| Keywords: | groundwater simulation water resources equilibrium analysis exploitation control plans |
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