The average annual suspended sediment load is 8033 t/yr (Fang et al., 2011). The climate is subtropical, with mean temperatures between 11 and 18 °C. The annual precipitation averages 1016 mm, and 70% of this occurs between May and September. The Wangjiaqiao watershed has six villages and 4920 people. The population density is 295 person/km2
, and the natural population growth rate is 0.66%.