基于移动窗口法的水电开发影响下景观格局梯度分析-《山地学报》

文章信息/Info

Title:: Gradient Analysis of Landscape Pattern Affected by Hydroelectric Station Based on Moving Window Method

Author(s):: LIU Qi; LIU Shiliang; ZHAO Qinghe; WANG Cong; DENG Li; YANG Juejie; DONG Shikui; School of Environment，State Key Laboratory of Water Environment Simulation，Beijing Normal University，Beijing 100875,China

Keywords:: moving window method; gradient analysis; landscape pattern; Manwan hydropower station

摘要:: 基于GIS技术,利用移动窗口法对漫湾水电站建设前后上下游的景观格局改变进行梯度分析,这对于确定梯级水电开发的生态效应及影响范围具有现实意义。结果表明:1974—2004年30 a中,由于梯级水电站的建设,漫湾电站上下游河岸景观格局随与大坝距离的增加呈现不同的梯度变化,上游距离电站0～10 km内景观破碎化程度、景观多样性程度、景观丰富度最大,11～30 km内有所降低,31～38 km内由于上游小湾电站建设使景观格局所受干扰增强。通过上下游景观格局变化对比表明:0～10 km内,漫湾水电开发对大坝上游的景观格局的影响大于下游,下游10 km之外,景观格局的变化因素具有不确定性,退耕还林政策的实...

Abstract:: Based on GIS technology and by using moving window method，We carried out gradient analysis of upstream and downstream landscape pattern before and after the construction of Manwan hydropower station. Practically，it is important to quantify the ecological effect and influential range of cascade hydropower development. The results showed that in the 30 years of 1974—2004，as distance to the dam increased the upstream and downstream landscape pattern presented different gradient change because of the construction cascade hydroelectric station. Within 0～10 km upstream from the power plant，the index of landscape fragmentation，landscape diversity and landscape richness were the largest. There was a slight decrease in all indexes within 11～30 km. Due to the construction of Xiaowan hydropower station upstream，the landscape pattern within 31～38 km upstream affected greatly. In addition，through the comparison of upstream and downstream change，it shows that the influence on landscape pattern caused by construction of Manwan hydropower station within 0～10 km in the upstream is greater than that in downstream. Although the factors resulting in landscape pattern changes of downstream outside 10 km distance is uncertain，the implementation of the policy of “Returning farmland to forest” may influence to a great extent.

备注/Memo:: 收稿日期(Received date)：2012-01-31；改回日期(Accepted) : 2012-04-24。
基金项目（Foundation item）：国家自然科学
基金项目、环保公益项目和中央高校基本科研业务费专项资金资助。\[The National Natural Science Fund Projects(No. 50939001)，Nonprofit Environment Protection Specific Project of China（No. 201209029），Central University basic research funds（No.105564GK）.\]
作者简介（Biography）：刘琦(1988-)，女，山东人，硕士，主要从事景观生态学研究。\[Liu Qi(1988-)，female，born in Shandong province，master，mainly engaged in landscape ecology.\] E－mail：liuqismile@yeah.net *
通讯作者(Author for correspondence ): 刘世梁\[Liu Shiliang\] E－mail：shiliangliu@bnu.edu.cn