我国南方崩岗侵蚀现状调查

崩岗是在水力和重力作用下山坡土体受破坏而崩坍和冲刷的侵蚀现象，是沟壑侵蚀的一种特殊形式。崩岗侵蚀不仅破坏土地资源，淤积河道、农田及水利设施，冲毁桥梁、道路、民房，而且给当地生态安全形成巨大威胁，同时也严重制约和阻碍了当地区域经济的发展。为此，开展了大规模崩岗调查，准确地掌握了南方崩岗分布情况、数量和发展趋势，以为开展崩岗治理提供决策依据。

Investigation on status of hill collapsing and soil erosion in southern China

The hill collapsing and soil erosion not only damages the land resources, river courses, farmland, water facilities, roads, bridges, civil buildings, but also becomes a big threat to security of local ecological system and severely restricts the development of local economy. Therefore, a wide investigation on hill collapsing has been carried out and its distribution, quantities and development trend have been found out exactly in southern China, so as to provide a basis of decision-making for its regulation...