The Construction Of Management And Assessment System In Groundwater Over-exploited Regions

As the main supply source of our country's industrial and living water, thegroundwater plays an essential role in ensuring the security of our drinking water,food, economy and also ecology. However, due to the long-term unreasonableexploitation, large areas of regional depression cones have been formed, and thegroundwater in some districts is in the danger of depletion. The overexploitation ofthe groundwater has caused a series of geologic environment problems such as landsubsidence, seawater intrusion and ecological deterioration, which brought seriousthreats to social and economic development as well as human life.It has been over a decade since the classification and management were carriedout in the overexploitation districts in our country. Yet due to a lack of themanagement guidelines and specific measures, people are still not able to master therectification progress and the corresponding effects thoroughly, meanwhile themanagement measures and experiences are not under systematical evaluation andreview. The very condition may militate against the treatment work of these districts.Hence, having a comprehensible understanding of the present management situationwith the existing problems, and also establishing the relatively scientific evaluationsystems are of great significance to enhance the treatment of the overexploitationdistricts and the management of the groundwater.The thesis makes a systematic summary of the division process, as well as thetreatment measures of some typical overexploitation districts. And based on thephases involved in the management, an evaluation system is formed from three levelssuch as the construction of monitoring system, the treatment measures and thetreatment effects. At the meantime, it provides a qualitative evaluation of theconstructive monitoring system and the treatment measures in the typical districts andoffers the corresponding suggestions. Then it reflects the variation trend of thetreatment effect by adopting a quantitative evaluation system. The purpose of which isto adequately report the present treatment progress in the overexploitation areas, andto make a summary and analysis of the management work.At last, the thesis sets out an assessment of overexploitation to Hebei Provinceand Suzhou-Wuxi-Changzhou district of Jiangsu Province based on the builtevaluation index system. It provides a qualitative analysis of the construction of themonitoring system and treatment measures of these two districts and meanwhile gives some suggestions. And the quantitative evaluation score for the treatment effect is64and99respectively. From the assessing process and the results, it can be seen that ourcountry is still weak in handling the exploitation districts. Thus it is highly advisableto perfect the basic constructions such as the monitoring system, and also to enactsome regulations with the purpose of further strengthening the management of theoverexploitation districts and then keeping the groundwater sources under feasibleconservation.