PROGRESS IN GEOGRAPHY ›› 2007, Vol. 26 ›› Issue (3): 38-46.doi: 10.11820/dlkxjz.2007.03.005

• Original Articles • Previous Articles     Next Articles

The Conceptual Fr amework of Water shed Landscape Optimization Concerning Water Environmental Protection

YUE Jun1,2, WANG Yanglin1,2, LI Guicai1,2, WU Jiansheng1,2   

  1. 1. College of Environmental Sciences, Peking University, Beijing 100871, China|
    2. Shenzhen Graduate School, Peking University, Shenzhen 518055, China
  • Received:2006-11-01 Revised:2007-04-01 Online:2007-05-25 Published:2007-05-25


Landscape pattern, function and process all have close relationship with certain scale. Watershed with clear boundary and special scale and character becomes a focus region in studying landscape ecological process. For the collection of water by the gravitation at the watershed scale, the change of landscape pattern will heavily influence the water quality. Because the change of landscape pattern will dramatically influence the non- point pollution, it is necessary to control the non- point pollution from the perspective of landscape optimization. Considering the needs of water environmental protection at watershed scale, it is necessary to study how the type, pattern and spatial difference of landscape influence water pollution process. By reason-able allocation and complex design of landscape pattern, optimal landscape will change the distribution characteristics of pollution and stop the diffusion of pollution at spatial space. This will do good to water environmental protection and non- point pollution decrease. In order to realize this target, this paper constructs a conceptual framework for landscape pattern optimization concerning water environmental protection. This framework mainly considers four aspects as follows: (1) the feasible usage of ‘Source’and ‘Sink’landscape with spatial differences as optimization rules; (2) the key points in ‘Source’and ‘Sink’landscape pattern optimization; (3) some limits such as quantity, cost and other things that influence the change of ‘Source’and ‘Sink’landscape; and (4) the combination of the landscape quantity optimization with the landscape spacial optimization. On the basis of these results, this paper fulfills a conceptual framework of landscape optimization concerning the water environmental protection and non- point pollution decrease. According to an optimal combination of these four aspects, we could analyze the studying area characteristics, clear studying aims, confine optimal rules and carry out the research step by step. With some controlling methods of landscape ecology optimization, the landscape pattern optimization and water protection will be also realized. This study supplies not only a new view for resolving non- point pollution problem at watershed scale, but also a valid measure for decreasing the influence of landscape type and pattern on water quality.

Key words: ‘source&rsquo, and ‘sink’landscape, landscape pattern optimization, Non- point pollution, water environmental protection, watershed