摘要
以地理信息系统的空间叠加作为技术支持,结合景观生态学格局指数的计算,研究了重庆璧山宏观水土流失的空间生态格局现状。结果表明:水土流失占全县面积97.19%,土地以坡耕地、水田利用方式为主,同时二者分布有较大的侵蚀面积;各侵蚀等级均有一定面积分布,整体侵蚀景观多样性、均匀度较高,没有优势要素存在;各侵蚀等级的破碎化较为严重,轻度、中度侵蚀分布较为集中,因此璧山县水土保持工作将是生态环境改善的重要任务,需要给予更多的投入。
With the technical support of space composition in geographical information system in combi- nation of the calculating of composition component in landscape ecology, the present article studies the space ecological pattern of Bishan water losses and soil erosion in Chongqing. The research result shows： the area of water losses and soil erosion covers 97.19 of the total area and the land is mainly used n the form of sloping fields and wet fields, in which larger area is eroded; in different ranks are distributed a certain area and the total erosion landscape is diversified and well-distributed without dom- inant factors; Brokenness is rather serious in different ranks, and light and medium erosion distribution is more concentrated. So the soil and water conservation work is an impontant task of improving ecologi- cal environments in Bishan County, which requires more investment.
出处
《贵阳学院学报（自然科学版）》
2007年第3期4-9,共6页
Journal of Guiyang University：Natural Sciences
关键词
水土流失
空间格局
景观
景观生态学
壁山县
water losses and soil erosion
space pattern
landscape
landscape ecology
Bishan County
