景观格局对河流黑臭水体生态修复的影响研究

Study on Impact of Landscape Pattern on Ecological Restoration of Black and Odorous Water Bodies in Rivers

为取得理想的河流黑臭水体生态修复效果,展开景观格局对黑臭水体修复的影响研究。在汉江中游选取研究区域,在该区域内划分8个水质监测断面,明确断面污染程度以及采集水样的水质均值指标;在不同宽度的缓冲区内对总氮、溶解氧、氨氮、总磷以及化学需氧量5种水质参数展开测定,并使用景观格局指数对水质参数的响应展开分析。结果表明,不同宽度缓冲区内的景观结构变量对水体修复的影响作用大于景观组成变量;研究区域内农用地对黑臭水体的修复产生的消极影响最显著;不同缓冲区的斑块面积和斑块面积对黑臭水体的修复的效果不同。

To achieve the ideal ecological restoration effect of black and odorous water bodies in rivers,a study was conducted on the impact of landscape patterns on the restoration of black and odorous water bodies.The middle reaches of the Han River is divide into 8 water quality monitoring sections to clarify the degree of section pollution and the average water quality indicators are used as water sample.Five water quality parameters,including total nitrogen,dissolved oxygen,ammonia nitrogen,total phosphorus and chemical oxygen demand,are measured in buffer zones with different widths,and the response of landscape pattern index to water quality parameters was analyzed.The results indicate that the impact of landscape structural variables within buffer zones with different widths on water restoration is greater than that of landscape composition variables.The negative impact of agricultural land on the remediation of black and odorous water bodies in the study area is the most significant.The patch area and patch area of different buffer zones have different effects on the remediation of black and odorous water bodies.