土地利用对埋藏型岩溶区岩溶水质的影响——以涪陵丛林岩溶槽谷区为例

岩溶水文系统的开放性和脆弱性,使其很容易受到人类不合理活动的深刻影响,造成水质的持续恶化。对比研究埋藏型岩溶垄脊槽谷区岩溶水质变化与土地利用的关系可以看出,研究区水质20年来的变化以及水质的空间变异与土地利用有很大的相关性;其中集约化的农业耕作、炸石填土增加土地面积、利用落水洞排放污水和独特的微型稻田水位控制设施对岩溶地下水水质产生显著影响;这也表明人类活动已经对该区水文地球化学产生了区域性的重大影响。面对区域岩溶水质恶化的趋势,通过土地整理,保护岩溶水质是迫切需要关注的工作。

The influence of land use on karst water quality of buried karst region-A case of conglin karst ridge-trough at Fuling Town

Karst hydrosystem is likely to suffer damage from human improper activities not only in bare karst region or cover karst region but also in buried karst region because of its natural fragility and susceptible character.Study on the relationship of karst water quality and land use made by karst water quality analysis and land use survey at Conglin karst ridge-trough indicated that water quality changes and water quality spatial-temporal variations are closely linked with land use,and the karst water quality is deteriorating.Human activities,such as intensive farming, land enlargement through rock bombing and earth filling,doline sewage discharge,water level control of paddy fields,etc,have exerted great impact on hydrogeochemistry of the region.Facing such a situation,we should protect karst water via land arrangement and development of eco-agriculture.