Evaluation of water resources carrying capacity based on entropy-weight and extension model.

【Objective】 An evaluation method of water resources carrying capacity is explored to provide a basis for rational development and utilization of water resources.【Method】 In view of matter-element extension of the concept,a model is established by the introduction of improved extension method-the greatest close-degree method and entropyt method to determine the weight factor with the support of entropy-weight and extension theory.This avoids the weight coefficients determined by subjective issue.And the model can be used to evaluate water resources carrying capacity for different frequencies in different planning years in Yuzhou.【Result】 Applying entropy-weight and extension model to evaluate water resources carrying capacity in Yuzhou,water resources carrying capacity of annual value of the distance from each grade is obtained for different frequencies in different planning years.The water resources exploitation and utilization of Yuzhou has considerable scale,but there is a potential for exploitation.Water supply demanding can meet the region's social development to a certain extent.【Conclusion】 Compared with social development and practical situation,the results are reasonable and the model adapts to water resources carrying capacity assessment.