提出内陆盆地增加降水量的三项必要和充分条件，即西风带、高山山脉冷凝作用和广大湿地提供水 气源。提出海水西调工程，从渤海西北海岸提水到大兴安岭南端，经内蒙古北部到达新疆，目的是恢复和扩大 西北湿地，治理沙漠和沙尘暴。工程将产生十大经济和生态效益，其中4条效益是不可替代的。

An advanced way for controlling desert and sandstorm to protect, recover and expand wetland in north and northwest China is proposed in this paper. The necessary conditions for increasing precipitation in inner continental basin contain mainly three aspects ： westerlies, high mountains for condensation and broad wetland fog as vapour resources . A scheme of project is envisaged, which introduces sea water from Bohai Sea through north Inner Mengolia to Xinjiang. The target of the project is to recover and expand wetland in northwest China. It will produce economis and ecological benefits in the aspects.