实施京津风沙源治理工程的问题及对策

该文根据有关文献和资料，介绍了我国沙漠化的现状及发展趋势，论述了气候变化和人类不合理活动是造成沙漠化的重要原因，认为只要控制人为干扰，并采取防治措施，半干旱地区的沙化土地很快就能自我恢复。同时文章介绍了京津风沙源治理工程的范围、任务、方式和目标，并指出完全依靠打28-64万眼井，长期超采地下水来维持林草植被生长，一旦引起地面下沉，会永远失去地下水库。该文建议要以水定井，严格控制超采，实施节水林农业，还认为从长远考虑，要尽快实施大西线调水工程，才能彻底改变“三北”地区的干旱荒漠面貌。

Problems and Countermeasures in Implementing Sandstorm-Source Control Project in and Around Beijing and Tianjin

Based on literature and the data of desert survey, the paper introduces the status quo and direction of China’s desertification, discusses the key reasons caused desertification by changes in climate and irrational activities of man, holding that once man’s interference is controlled and protective measures are taken, land under desertification in semi-drought areas will soon recover to arable land naturally. The paper also introduces the scope, tasks, approaches, and goals of sandstorm source control project in and around Beijing and Tianjin, pointing out the danger of solely depending on drilling 286 400 wells and pumping excessively the underground water to maintain vegetation of trees and grass, for once the ground sinks, the underground reservoir will disappear forever. The paper suggests that the drilling of wells rely on the capacity of underground water, excessive pumping the strictly forbidden, and water-saving agro-forestry be practiced, concluding that in the long run only when water diversion in Western China is put into effect can the desertification condition in the “Three Norths” be thoroughly changed.