Fractal dimension estimation of groundwater depth series of well irrigation area in Sanjiang Plain based on continuous wavelet transform

In order to reveal the groundwater depth series complexity characteristic of well irrigation area in Sanjiang Plain, taking Jiansanjiang branch bureau as example, the fractal dimension estimation method of hydrological series based on continuous wavelet transform was adopted to analyze the complexity of groundwater depth series in 7 production teams of Jiansanjiang branch bureau. The results show that the wavelet fractal dimension estimation method is robust and feasible. The complexity order of each groundwater depth series from big to small is as follows: 69th production team of Farm Qixing, 22th production team of Farm Qianjin, 4th production team of Farm Qianjin, 1th production team of Farm 859, 11th production team of Farm Qianjin, 26th production team of Farm 859, 21th production team of Farm 859. We can see that the groundwater exploitation is the key driving factor of groundwater depth complexity. The research achievements reveal the characteristic of local groundwater resources complex system and provide decision basis for scientifically managing groundwater resources in Jiansanjiang branch bureau so much as the entire Sanjiang Plain.