A Macro Water Supply System Evaluation Model

摘要

In this paper, an evaluation and decision model for the water supply system in a region was built using the method of Grading Evaluation Method (GEM). Four indicators are defined, which are Probability of Water Supply (IS), Reliability of Water Supply (IR), Water Utilization Rate (IW) and Efficiency of Water Utilization (IE). The grades (+, =,-) of them respectively represent the indicator are high, middle and low. Then I set up a water supply indicator system and display in the evaluation and decision table. From the table, we can look to the problem and find corresponding solutions. On the basis of GEM, I creatively formulate the evaluation model. Meanwhile, a creative intervention plan is presented. At last, Egypt was chosen to verify the rationality of the model. The results are IS-, IR-, IW+, IE-, which shows Egypt's water will be over-exploited in the next few years.