A study on the ecological water requirement in the Xin' an county section of the Jian river channel

Taking the urban section of Xin' an County in the Jian River as an example, this study statistically analyzed hydrological data from the Xin' an Hydrological Station from 1959 to 2010.It used the Tennant method from hydrology and the R2CROSs method from hydraulics to analyze and calculate the basic ecological water requirement within the river channel. Additionally, the study calculated the water requirements for river water purification, river evaporation and seepage, and the minimum sediment transport in the river channel. Following the principle of non-redundant calculation, the maximum value among these water requirements was taken, resulting in an ecological water requirement of 3010.0 m³/s for the urban section of the Jian River. This water volume is the optimal requirement for restoring the ecological structure and functional health of the river section. This result has important reference significance for the sustainable use of water resources in the river channel and the maintenance of the river ecosystem balance.