Prediction of water scarcity situation of a region

Currently, one quarter of the world's population is experiencing water scarcity. In order to alleviate this situation, a prediction model which based on quadratic curve fit and the method of Grey Verhulst has been built. We used quadratic curve fit to forecast the comprehensive indicator and the per capital water supply and demand ratio. And the wastewater emissions are predicted by the method of Grey Verhulst. Through the prediction results of these three indicators, we can know what the water scarcity situation of a region, a country, or a city will be in the future. So we can take measures in advance and minimize adverse effects.