Base flow separation method and isotope technique were adopted to study the cyclic relationship between river water and groundwater. 通過(guò)基流分割計算和同位素技術(shù)的應用，研究了區內地下水和地表水之間的水循環(huán)規律及地下水對黃河的貢獻。
The ray theory of geometric optics was applied to visually investigate the propagation of quasi stationary waves in time mean basic flow and interpret the zonal nonhomogeneity. 應用幾何光學(xué)中的射線(xiàn)理論，直觀(guān)地討論了準定常波在時(shí)間平均基流中的傳播，解釋了定常波傳播的緯向非均勻性。
