Author(s): Suiliang Huang; Xiao Yao; Zhou Jianguo
Linked Author(s): Suiliang Huang
Keywords: No Keywords
Abstract: Upper-middle reaches of Luanhe River Basin belongs to Haihe River Basin and it is a pretty important water source to North China, especially to Tianjin and Tangshan Cities, Hebei. Based on control units of the water function areas and the sub-basins the working units were produced. The index system for environmental risk source hazard was constructed by adopting the pressure sta te response (PSR) environmental analysis model. The environment risk sources are identified and their hazard grade assessment is performed. In the environmental risk source hazard an assessment index system, namely “downstream characteristics of environmen tal risk sources” is added by taking the fact into account that environmental risk sources themselves are affected by different functional areas (working units) downstream along rivers. Through collecting hazard data, determining their standards and weights for environment risk sources, the fuzzy comprehensive evaluation method is used to calculate the risk source hazard grades and the vulnerability grades of the working units. Using the one dimensional exponential decay river model of pollutants in rivers, the hazard grade evaluation method of working units is established. Hazard grades of working units are composed of two parts: the risk source hazard grade of the working unit itself, and the impact of the risk sources upstream on the working unit downstre am along rivers. Combining the hazard grade with the vulnerability grade of the working unit, the risk grade of the working unit is evaluated through the risk matrix. The risk zones of the watershed are realized by merging working units in the same control units of the water function areas with the same risk grades. The risk zoning of sudden water pollution incidents in the upper, middle reaches of Luanhe River Basin is obtained by applying the above risk zoning method. It is found that there are 55 risk zones in total, including 3 of the highest risk zones, 15 of higher risk zones, 14 of lower risk zones, 23 of the lowest risk zones. These results indicate that the upper, middle reaches of Luanhe river are overall at low risk. The corresponding management methods for the different risk zones are suggested.
Year: 2018