Statistical models cannot be explained with explicit theory, and it may be used to estimate soil water constant with lower precision. But they were simple and feasible for estimation of soil AWC in a large-scale area.

• 研究所得的土壤AWC估算模型，对于个别土壤类型不适用，但对于粗略地估算大区域范围的土壤水分常数是基本上可行的。