Environmental health risk assessment of heavy metals in drinking water source based on cloud model
WU Jun-we · Fuzhou daxue xuebao. Ziran kexue ban · 2014
For solving all kinds of uncertain problems,the model of health risk assessment of heavy metals was established based on cloud model. As a case study,the risk is classified into six levels, and the model established is applied for health risk assessment of Fe,Mn,Cu,Cr,Cd,As and Pb in a drinking water source. The results show that the risk of the water resource is high to Ⅳ grade. The evaluation method based on cloud model is not only able to determine the level of risk,but also reflect the difference in the same risk level of heavy metals. Compared with the methods based on Interval Number Theory,the cloud model uses the degree to determine the final risk level and the applicability of the method is verified. The cloud model visualizes the evaluation results and people can intuitively understand the current risk.