[Risk assessment and safety evaluation using system normative indexes integration method for non-point source pollution on watershed scale].
Decision-makers take non-point source pollution under control as well as possible results from enough information of risk trend of nonpoint source pollution on watershed scale. System normative indexes integration evaluation method about system risk trend was developed when focusing on that the probability values of some elements attributing to some trend of the system were more than one, and that the system evaluation needed a formula from the system structure. On the basis of analysis on aspects and characteristics of the system risk normalization, a new valuation method, the relationship between the normalization values of the system and the factors was established. The Lugu Lake Watershed in Southwest China was selected as study area to assess the risk of non-point source loss to surface water using this method. The results indicate that 1) the wholly risk of non-point source loss to surface water in this watershed is in a high level; 2) the system indexes integration evaluation method is an universal method to evaluate a quality or a trend of any system and shows a great power in comparing several systems; 3) the method is helpful to attain an effective and integrated assessment on a system when it is combined with other methods.
Liu
Jian-Chang
JC
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. amoytiger@163.com
Yan
Yan
Y
Liu
Feng
F
Ding
Ding
D
Zhao
Ming
M
D002681:China; D003247:Conservation of Natural Resources / Q000191:economics / Q000379:methods; D040362:Geographic Information Systems; D019015:Geologic Sediments / Q000032:analysis*; D008962:Models, Theoretical; D018570:Risk Assessment; D014876:Water Pollution / Q000191:economics / Q000517:prevention & control*