近年昆明市茨坝—岗头村富水块段地下水位持续下降原因分析
茨坝—岗头村富水块段位于蛇山断裂东侧盘龙江谷地,东以黑龙潭东支断裂、玄武岩为隔水边界,南以陡坡寺组泥质粉砂岩为隔水边界,面积16.07 km2.富水块段岩溶含水层主要以二叠系和石炭系的灰岩、白云岩为主,埋深2.5～173.92 m.块段内岩溶地下水由北向南,由西向东径流,于山前缓坡边缘以泉排泄,部分向深部径流,形成承压区.为弄清近年富水块段岩溶地下水位持续下降的原因,在查明富水块段水文地质条件的基础上,对比分析了该富水块段近3年（20092011年）降雨量与多年平均降雨量及其地下水补给、开采减少量和地下水位的变幅.结果表明,降雨量偏少是导致地下水补给量减少,进而造成茨坝—岗头村富水块段在关闭部...
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| Published in | 中国岩溶 Vol. 32; no. 3; pp. 313 - 317 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
云南省地质环境监测院,云南昆明,650216
2013
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4810 |
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| Summary: | 茨坝—岗头村富水块段位于蛇山断裂东侧盘龙江谷地,东以黑龙潭东支断裂、玄武岩为隔水边界,南以陡坡寺组泥质粉砂岩为隔水边界,面积16.07 km2.富水块段岩溶含水层主要以二叠系和石炭系的灰岩、白云岩为主,埋深2.5～173.92 m.块段内岩溶地下水由北向南,由西向东径流,于山前缓坡边缘以泉排泄,部分向深部径流,形成承压区.为弄清近年富水块段岩溶地下水位持续下降的原因,在查明富水块段水文地质条件的基础上,对比分析了该富水块段近3年（20092011年）降雨量与多年平均降雨量及其地下水补给、开采减少量和地下水位的变幅.结果表明,降雨量偏少是导致地下水补给量减少,进而造成茨坝—岗头村富水块段在关闭部分开采井及减少开采量后,地下水位仍然持续下降的主要原因. |
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| Bibliography: | YUAN Zhong-yu,PENG Shu-hui（ 1.Yunnan Institute of Geo-Environment Monitoring, Kunming, Yunnan 650216, China;） 45-1157/P karst groundwater; decline of groundwater table; precipitation recharge; Ciba-Gangtou village water-rich block; Kunming in Yunnan The Ciba-Gangtou village water-rich block,16.07 km2 in area,is located in the Panlongjiang river valley on the east of Sheshan fault in northern suburb of Kunming.There are some famous karst springs such as the Heilongtan,the Lanlongtan and the Bailongtan.The karst aquifer of the water-rich block mainly composed of limestone and dolomite in the Permian and Carboniferous systems covered on the top by quaternary proluvial and alluvial gravel layers of 2.5-173.92 m in thickness.It takes east Heilongtan branch fault and basalt as the impermeable boundary to the east and the Douposi group argillaceous siltstone as the impermeable boundary to the south.Groundwater flows from north to south and from west to east,some of the groundwater discharges by the spring on the gentle |
| ISSN: | 1001-4810 |