Soil environmental capacity is defined as the maximumpermitted load of the pollutant in a cettain soil environmental unitwithin a certain temporal period. With that load, the criteria canbe maintained, production and ...Soil environmental capacity is defined as the maximumpermitted load of the pollutant in a cettain soil environmental unitwithin a certain temporal period. With that load, the criteria canbe maintained, production and quality of crops can be gqaranteed.Regional soil capacity is the function of physical geographiccharacteristics. In determining capacity of sierozem, key stepsinclude: (1) establishing the criteria on comprehensive basis, (2)calculating the permitted input with the application of the capacitymodel. Dynamic capacity of Cd, Cu, As and Pb for sierozem isreported and compared with that of phaiozem and red 1oam.According to the results, it is obvious that regional differentiationin capacity is distinct and the distribution pattern of permittedload is closely related to the spacial variation of physicalgeographic processes.展开更多
Ecosystem health has been a focal point and research frontier of applied ecology in recent years,increa-singly used in urban ecological studies.To quantify the effect of ecological improvement from eco-planning,an eco...Ecosystem health has been a focal point and research frontier of applied ecology in recent years,increa-singly used in urban ecological studies.To quantify the effect of ecological improvement from eco-planning,an ecosystem health assessment method is used in eco-planning evaluation and decision support in the urban eco-planning research of Guangzhou City of China.Based on features of an urban ecosystem,five factors such as vigor,organizational struc-ture,resilience,ability to maintain ecosystem service,and influence on people’s health were selected to develop the assessment indicator system.Then,to evaluate the validity of planning measures,a cost-effect analysis of the different sce-narios on eco-planning was made,taking investment of the planned projects as the cost and ecosystem health state after implementing the scenarios as the effect.To establish priority of all the proposed planning schemes or countermeasures,variation of the ecosystem health state was evaluated when the investment of eco-environmental construction projects changes by P10%,P20%and P50%,respectively.Thus,the order of importance of eco-environment construction projects to the urban ecosystem health state can be worked out,providing a reference for prioritizing the implementation of such urban eco-environmental projects.The study proved the trial value of an ecosystem health evaluation method in urban eco-planning research.展开更多
文摘Soil environmental capacity is defined as the maximumpermitted load of the pollutant in a cettain soil environmental unitwithin a certain temporal period. With that load, the criteria canbe maintained, production and quality of crops can be gqaranteed.Regional soil capacity is the function of physical geographiccharacteristics. In determining capacity of sierozem, key stepsinclude: (1) establishing the criteria on comprehensive basis, (2)calculating the permitted input with the application of the capacitymodel. Dynamic capacity of Cd, Cu, As and Pb for sierozem isreported and compared with that of phaiozem and red 1oam.According to the results, it is obvious that regional differentiationin capacity is distinct and the distribution pattern of permittedload is closely related to the spacial variation of physicalgeographic processes.
基金This study was supported by the National Key Basic Research and Development(973)Program of China(Grant No.2005CB724201)the Natural Science Foundation of Beijing(Grant No.8072004).
文摘Ecosystem health has been a focal point and research frontier of applied ecology in recent years,increa-singly used in urban ecological studies.To quantify the effect of ecological improvement from eco-planning,an ecosystem health assessment method is used in eco-planning evaluation and decision support in the urban eco-planning research of Guangzhou City of China.Based on features of an urban ecosystem,five factors such as vigor,organizational struc-ture,resilience,ability to maintain ecosystem service,and influence on people’s health were selected to develop the assessment indicator system.Then,to evaluate the validity of planning measures,a cost-effect analysis of the different sce-narios on eco-planning was made,taking investment of the planned projects as the cost and ecosystem health state after implementing the scenarios as the effect.To establish priority of all the proposed planning schemes or countermeasures,variation of the ecosystem health state was evaluated when the investment of eco-environmental construction projects changes by P10%,P20%and P50%,respectively.Thus,the order of importance of eco-environment construction projects to the urban ecosystem health state can be worked out,providing a reference for prioritizing the implementation of such urban eco-environmental projects.The study proved the trial value of an ecosystem health evaluation method in urban eco-planning research.
