摘要
花江喀斯特峡谷区地下水埋藏深,地表干旱,存在显著的人为加速土壤侵蚀过程,植被次生性明显,生境干热特征显著,是已石漠化和半石漠化的生态系统。其中地质构造、地貌演化、岩溶形态、可开发利用的水资源、植被群落可能是石漠化过程的主要自然成因,以土地利用为表现形式的强烈人类活动是石漠化的驱动力。基于此,提出了石漠化地区的土地利用方式和生态恢复过程的建议,旨在为石漠化的演化研究及生态重建提供参考。
Karst rocky desertification is a kind of land degradation which has happened in fragile karst mountain ecosystem in southwest China. Huajiang gorge district is characterized by deep buried groundwater, drought terrain, remarkable artificial accelerating soil erosion processes, secondary vegetation, dry and hot microhabitat, which is a kind of rocky desertification and half rocky desertification ecosystem. Geological tectonics, landforms evolution, karst forms, exploitable and usable water and vegetation community may be the main natural causes of karst rocky desertification in Huajiang gorge district, violent human impaction as its driving force, and the most important cause is the irrational human activities including overgrazing, deforestation and cultivation. Based on these knowledge, this paper put forward some suggestions and opinions on land use patterns and ecological rehabilitation processes in order to offer a reference example for karst rocky desertification evolvement and eco-environment construction studies.
出处
《水文地质工程地质》
CAS
CSCD
2004年第6期37-42,共6页
Hydrogeology & Engineering Geology
基金
国家自然科学基金项目(49833002和90202003)
中科院知识创新项目(KZCX2-105)和人才基金"西部之光"资助项目
关键词
喀斯特石漠化
成因
花江峡谷区
karst rocky desertification
formation mechanism
Huajiang gorge district
