论文部分内容阅读
一、稻田地下水变化规律(一)一垅稻田地下水的变化(1)丘陵区据15个垅500多亩稻田逐丘设井观测,一垅稻田地下水位(指地下水观测井的自由水面距田面高度,高于田面为负值)是一条由上向下倾斜的圆滑的阶梯状的曲
(1) Change of Groundwater in Rice Fields (1) According to the observation of 15 paddy fields of 500 mu in hilly areas, the water table of groundwater in paddy fields (referring to the free surface of groundwater observation wells from the height of the field , Above the surface of the field is negative) is a smooth downward-sloping ladder-like song