Abstract: Since the conventional evaluation coefficients of water resources environment system service function could neither reflect the ‘Binary-3D’ hydrogeology condition, nor indicate the influence of water environment on its service function, leading to a great deviation of evaluation result from reality. This paper combined the water environment with the karst development intensity to determine the correction coefficients in karst area. Then, the service function value for each city or prefecture was modified. The results showed that：(1) The main service function of water resources environment system in Guizhou province was ‘hydrologic storage & regulation and navigation’ and ‘environmental regulation & purification’, valued 789.22×108 and 742.66 ×108 yuan respectively, both of which account for 69.48% of the total value of the province. (2) the value of water resources environment system service function mainly depends on the supply & demand conditions of water resources, water area and the development of water tourism landscape. Moreover, the higher the utilization rate of regional water resources environment system is, the greater the value of water resources environmental system service function will be. The city of Guiyang possesses the maximum value of 292.65×108 yuan, while the city of Bijie displays the minimum value of only 74.35×108 yuan. (3) the correction coefficients were divided into water volume type, water quality type and mixed type, and the average values of these types were 0.81, 0.86 and 0.84 respectively, which were generally consistent with the characteristics of water cycle and water quality in different cities or prefectures. The above results indicated that the utilization of correction coefficients derived from development intensity and water environment to correct the evaluation results could not only highlight the influence of karst development characteristics on water resources and environment system service function, but also make the evaluation results more congruent with the real water ecological environment.
Key words：water resources environment; service function; evaluation; revise