Building can be difficult where the water table lies close to the surface.在地下水位接近地表的地方不易建楼。Environmentalists say that diverting water from the river will lower the water table and dry out wells.环保主义者称引流河水会导致地下水位下降和水井干枯。Heavy rainfall has caused the water table to rise.强降雨导致地下水位上升。