Land subsidence has become a serious issue in Cangzhou for a long time. In order to make reasonable use of groundwater resources. it is necessary to establish a warning groundwater level under the premise of controlling the development of land subsidence. How to quantitatively determine the critical gorundwater level (CWL) for comprehensive control of land subsidence. https://balboasurfandsstylers.shop/product-category/big-girls-woven-tee/