| Abstrakt: |
Shallow groundwater is the main water source of the local farmland irrigation in Taihang Piedmont Plain agricultural area. In this paper, the results are based on monitoring data and correlation analysis method. The results showed that: (1) in the piedmont of Taihang mountain agricultural region, Precipitation, aeration zone water and shallow groundwater have inherent flux (per unit time per unit area of water flow) relations and change rule. At the same section, the same time, Infiltration recharge in different measurement depth (or different groundwater depth) distributes the same straight line of "3-types water" transformation diagram. The slope of the line is -1. Intercept is the algebra sum Wu of precipitation, surface runoff and land surface evapotranspiration. (2) When the precipitation is larger than the sum of surface runoff and land surface evapotranspiration, the straight line distributes right of the origin of coordinates. When the precipitation is smaller than the sum of surface runoff and land surface evapotranspiration, the straight line distributes left of the origin of coordinates. When the precipitation is equal to the sum of surface runoff and land surface evapotranspiration, the straight line passes through the origin. Therefore, the combination of the above analysis characteristics and the mechanism of Wu>, <, =0, can guide the reasonable irrigation and alleviate groundwater overdraft in agricultural area. [ABSTRACT FROM AUTHOR] |
