摘要
利用灰色关联分析方法研究了深圳市西部水库流域景观格局指数与水质指标的关联关系,并探讨了"源"、"汇"景观格局对非点源污染的影响程度.结果表明:研究区"源"、"汇"景观的优势程度、聚集程度和破碎程度显著地影响流域内水体质量;2000—2001年,由于研究区"源"、"汇"景观格局的变化,使得整个流域内污染物输出程度不断加剧,污染物得以削减的程度不断降低,导致研究区水体质量恶化.结合研究区"源"、"汇"景观的空间分布特征来看,水库水体质量的变化与"汇"景观在流域下游的分布特征具有紧密关联,这说明"汇"景观格局对非点源污染的防治起着非常重要的作用.
In this paper, the relationships between landscape pattern and water quality at western reservoir area in Shenzhen City were studied with grey connection method, and the influences of ‘source＇ and ‘sink＇ landscape patterns on non-point pollution were probed. The results showed that the dominance, adjacency, and fragmentation of ‘source＇ and ‘sink＇ landscapes could markedly influence the water quality. From 2000 to 2001, due to the changes of the ‘source＇ and ‘sink＇ landscape patterns in research areas, the output of pollutants increased and the reduction of pollution decreased, resulting in the deterioration of water quality of three reservoirs. According to the spatial distribution of ‘source＇ and ‘ sink＇ landscapes, it was found that the distribution of ‘sink＇ landscapes at the middle-lower reaches of the watersheds had close relationships with the changes of reservoir water quality, suggesting that ‘sink＇ landscape pattern was of significance in the management of non-point pollution.
出处
《应用生态学报》
CAS
CSCD
北大核心
2008年第1期203-207,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金重点项目(40635028)
国家自然科学基金资助项目(40471002).
关键词
景观格局
水质
灰色关联
源
汇
非点源污染
landscape pattern
water quality
grey connection
source
sink
non-point pollution.
