农村小流域景观结构与水质耦合关系分析———以仪征市陈集镇为例

Abstract

Abstract: Two typical small ruralwatersheds in Chenji Town of Yizhengwere selected in a study of coupling relationships between water quality and landscape stucture. Results show that (1) landscape structure varied sharp lywith terrains, and so did characters of the water environment. With declining terrain, concentrations of TN and TP decreased in Xiaoxuzhuang watershed, but rose first and then fell in Gaotang watershed; (2) good correlations were observed of concentrations of TP, TN, NH3-N, and NO3- -N with proportion of source landscape, ditch density, landscape diversity index; and (3) stepwise regression revealed that 94% of TN depended on p roportion of source landscape and ditch density,while over 80% of NH3-N and NO3- -N on p roportion of source landscape. It is advisable to run effectivemanagement of nutrients in the watershed landscape and reinforce control of agricultural non=point source pollution by optimizing landscape structure of the watersheds.

Key words: water environment, landscape structure, coupling analysis, Chenji, small watershed

CLC Number:

X21
S181

LI Yu-Feng, LIU Hong-Yu, HAO Jing-Feng, CAO Xiao, HU Jun-Na. Relationship Between Landscape Stucture and Water Environment in Small Rural Watersheds[J]. Journal of Ecology and Rural Environment, 2010, 26(1): 15-19.

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Relationship Between Landscape Stucture and Water Environment in Small Rural Watersheds

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