| 摘要: |
| 广西来宾峰林平原区的岩溶含水层具有较成熟的三元垂直分带,即浅层岩溶带、中层和深层溶洞带;浅层带岩溶发育强烈且相对均匀,管道多呈网络状发育;含水层给水度大,透水性好,疏干和补给易于实现,具有较强的调蓄水资源能力。地下水开发构想是在枯水季节抽取超过天然径流量的地下水,获得需要的灌溉水资源量;雨季通过天然回灌,把含水层重新充满。开发地下水的关键是定井技术,主要有地质分析、蓄水构造分析、物探、核技术等方法,建议地质-物探-勘探方法综合定井。平原区常用的地下水开发工程有机井、大口井、辐射井、集水槽等,建议根据不同水文地质条件合理采用。 |
| 关键词: 峰林平原 岩溶含水层 地下水开发 定井技术 |
| DOI： |
| 投稿时间：2000-02-01修订日期：2000-04-21 |
| 基金项目:广西留学回国人员科学基金项目资助(桂科回9661010)。 |
|
| Characteristics of Karst Aquifers and Groundwater Exploration in Peak Forest-Plain Area:An Example in Laibin County,Guangxi |
|
Chen Weihai
|
| (Institute of Karst Geology, Chinese Academy of Geological Science, 50 Qixinglu, Guilin, Guangxi, 541004, China) |
| Abstract: |
| There are well-developed vertical zones in the karst aquifers in the peak forest-plain system of Laibin County, middle of Guangxi. They are epikarst zone,middle and deep cave zones. In the epikarst zone, the karstification is strong and homogeneous relatively,and the reticulated conduits are quite developed.As the characteristics of the largely effective porosity and well permeability as well as easy drainage and recharge of the drawdown cone, karst aquifers possesses a great potential of regulation capability to groundwater resources. The proposal for groundwater exploitation is to over-pump groundwater from aquifers to irrigate in the dry season, where can be refilled by natural recharge in the next wet season.One of the major technical problems in groundwater exploitation is borehole location, which contains many measures such as hydrogeological analysis,groundwater-storage structures analysis, geophysical prospection, nuclear technique. The mulit methods combining hydrogeology, geophysical and drilling is suggested to borehole location. The main means for groundwater exploitation and utilization are drilled well, dug well, radial well,groundwater-collection trough, and they should be used in the projects according to the local hydrogeological conditions. |
| Key words: peak forest-plain karst aquifer groundwater exploration borehole location techniques |
