喀斯特荒漠化是一种地质—生态灾难

ＫＤＮ是一种ＧＥＯＬ－ＥＣＯＬ灾难,是发生潮湿的碳酸盐岩区的土壤侵蚀、土地退化与生态系统凋萎,致使人类很难生活在其中。ＫＤＮ是我国四大ＧＥＯＬ－ＥＣＯＬ灾害中最难整治、最难摆脱贫困的地区。本文按国际公认的原则为准,认定“石山化”≠ＫＤＮ,从地质结构性气候、物候和生态系统多因子厘定了ＫＤＮ术语,认定人为扰动与人口超载是其产生的序参量。其过程最迟也是３００多年前明清朝代屯垦开始,近半个世纪加速衰竭,森

KARST DESERTIFICATION AND ASSESSMENT OF ITS DISASTERS

KDNCkarst desertification)is a geological-ecological disaster because of soil erosion of carbonate terrain in wet climate zone. In KDN region,ecosystems are at a low ebb and have withered. In such environment human lives will be very hard.In China exist four geological-ecological areas (large areas) : north west sand desert, Hubei, Shannxi, Gansu, Ningxia and Shanxi loess, southwest laterite, and southwest karst. KDCkarst desert)is the most difficult to control.In the paper,according to international knowledge,I think"stone-fication" (soil hill to change into stone hill)is not KDN(karst desertification). By means of region climate, geological structure, bio-climate and ecosystem,I conclude that the original factors of KDN are human action and population overload.In southwest China,KDN process has lasted 300 years. In these regions SEE (social ,economic,environmental.klevelopment became very slow.KDD(karst desert disaster)may be according to 4 group classifications;