| 摘 要： | The principles, contents and measures of bio_ecological
engineering fo r contr olling debris flow, based on the ecological principles and local
natural conditi ons, were documented in this paper。Nanjian county, characterized as dry
ho t valley climate, lies in the mid_southern part of Yunnan province。The bio _e
cological engineering for controlling debris flow of Houshan area by Nanjian cou nty town
was conducted from 1989 to 1997 。The various gullies, slopes and other disaster bodies,
and human being activity factors in the area had been planed separately and managed
simultaneously。The guiding principles of "stabilizing, protecting and using"
were specially emphasized in the project．The construction of water storage, combination
of biological hedge and check dam, improvement of water cycling on slope fields and
regeneration of forest vegetation were also p ractised．The protecting system consisted
of 77 check dams, 630 meters of discha rge canal, 830 bio_check dams, 2 500 meters of
bio_hedge and 709 water storage pits , an d afforestation area of 2.8 km2 was
built in the area．The insurance ratio of th is project is 0.5% and the social, economic
and ecological effects are obvious．
|
