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乌江是长江的八大支流之一,是贵州流域面积最大的河流,干流全长1037km,贵州境内长874.2km,流域面积占全省总面积的37.95％。乌江流域是贵州开发较早、垦殖程度最高的地区,流域内城镇密布,农地集中,工业较发达。流域区地处亚热带,降水充沛,雨量集中在4～9月,且多暴雨。境内碳酸盐类广布,成土作用缓慢,土层极薄,砂页岩山地成土较快但极易流失。境内森林由于重砍轻造,经营粗放,不仅覆盖率低而且森林质量、产量也低,森林防护功能不能充分发挥,新造防护林在短期内也难以充分发挥作用。我国著名的防
The Wujiang River is one of the eight major tributaries of the Yangtze River. It is the largest river in Guizhou Basin. The total length of the main stream is 1037km. The territory of Guizhou is 874.2km long. The basin area accounts for 37.95% of the total area of the province. Wujiang River Basin is Guizhou developed earlier, the highest degree of reclamation areas, densely populated towns, concentrated agricultural land, more developed industries. Watershed area is located in the subtropical, abundant rainfall, rainfall concentrated in 4 to 9 months, and more heavy rain. Wide range of carbonate, soil slow acting, extremely thin soil, sand shale mountain soil faster but easily lost. Due to heavy cutting and light construction, the extensive operation of domestic forests not only results in low coverage but also low forest quality and low yield, and forest protection functions can not be brought into full play. It is also difficult for new shelter forests to fully play their role in the short term. Our famous defense