KMS Institute of Mountain Hazards and Environment,CAS
|Alternative Title||PROSPECT OF BIOLOGICAL CONTROL AND EXPLOIT TO DEBRIS FLOW IN HOT-DRY VALLEY|
|Keyword||干热河谷 泥石流 生物防治 开发前景|
Hot-dry valleys are widely distributed in subtropical zone of China. For example, Red River, Lanchang River, Nu River Jingsha River, Yanong River,Ming River and so on, as well as their branches, are all characterized by the climate of hot-dry valley. After premerial monsoon rain forests were destroyed, the landscope of secondary grassland with sparse woods apeared. In generally, grass is 20-30 cm high, percentage of grass cover is 30-40%. Water and soillose seriously, soillayer is thin and poor. The ecosystem becomes worse, the ability of preventing the hazards decreases.
Due to natural force and human activity , erosion and transporation are enhanced. The mountain hazards ,such as debris flow ,occur frequently. For instance, the 40km-long highway from Duge to Laomu-River electric station in Lingnan, Liangshan, Sichuan line with 20 debris flow ravines. So it is trouble to construct in mountain areas. There are 41 poor-counties total in Yunnan Province , and 10 of them are in hot-clry valley in Jingsha River. So it is an important task for the hot-dry valley areas to administrate，exploit and break away from poor.
If the vegetation in slope will be restored as soon as possible, the environment will be imporved and the administation will be accelarated , debris flow and othcr hazards will be reduced or be brought under permanent control. Just mention two provinces -- Sichuan and Yunnan, 5 debris flow ravines were tackled in a comprehensive way. The social, economical and ecological benefit was notable. For a typical instance , after Heisha River, Xichang, Sichuan was administrated, percentage of forest cover increased from 2. 7 % to 74% , 133ha debris flow wasteland were changed to farmland. People planted mulberry and raised silkworms. The income only in sericulture was over 10 million
|Other Abstract||干热河谷分布广，植被稀疏，在自然力和人为因素作用下，使生态环境恶化，水土流失加剧，泥石流暴发频繁，给山区开发建设带来许多阻碍。若加速治理，恢复植被， 改善环境，泥石流等灾害可以减轻或根泊，干热河谷开发利用前景十分广阔。|
|张有富. 干热河谷泥石流生物防治与开发. 泥石流观测与研究. 北京:科学出版社,1996:127-131.|
|Files in This Item:|
|127-131.pdf（657KB）||专著章节文集论文||开放获取||CC BY-NC-SA||View Application Full Text|
|Recommend this item|
|Export to Endnote|
|Similar articles in Google Scholar|
|Similar articles in Baidu academic|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.