【摘要】 通过分析历史文献资料和实地调查材料,总结了随州市土地利用变化及其环境效应,认为:近50年来,随州市土地利用结构发生了显著变化,林地增加了90%,耕地增加77.8%,草地面积减少了98%,荒地面积减少了近73.5%;在如此大的土地利用变化强度下,用地类型之间的频繁转换严重干扰了生态环境的自我调节能力,造成区域内水土流失,水质恶化,水旱灾害频繁发生。更多还原

【Abstract】 Based on analysing historical and field survey materials, this paper draws some conclusions about the land use changes and the environmental effects of Suizhou city, Hubei Province. Results show that, in the 50 years from 1949 to 2000, notable changes of land use structure have happened, e.g., the forested land area and farmland area have been increased by 90%, (77.8%),respectively, and the grassland area and barren area decreased by 98% and (73.5%), respectively, under such intensive land use change state, the frequent conversion of land use category has seriously disturbed the self regulating capacity of ecotope, so water and soil loss has been accelerated, water quality worsened, and frequencies of flood and drought disasters increased.更多还原