Study on the river water environment capacity by geographic information model method: An example from Guilin Section of Lijiang River

The mathematical analysis method can't be applied to deal with the complexity of the geography and the mathematical statistics method and to analyze the cause of the formation in establishing a water enviroment capacity model in a complex river.The geographic information model (GIM) is a better method to complex geography and a model that combines the inevitability with the chanciness of the geographic phenomena.In this paper,the water enviroment capacity (WEC) of Guilin section of Lijiang River,a complex karst,is studied by using GIM,the application of the GIM to water environment capacity calculation is discussed,and a GIM model is established and is validated.The result shows that the GIM method is a simple calculating method and can reach a perfect result when it is applied to calculate the WEC in a complex section of a river.