【摘要】 <正> 解放后,山西省右玉县在当地主要河流苍头河及其支流的岸滩上,营造了以小叶杨、沙棘、乌柳为主的护岸护滩林。根据1978年的航片解译统计,主要河道的护岸林长约222.9公里,面积达4.4万余亩。这些植物护岸工程,分布河道两岸,枝密根繁,郁郁葱葱,在防冲固岸和保滩护田上起到了良好作用。为弄清护岸护滩林的防护机理及效益,我们于1985年9月25日至10月17日,对右玉县苍头河及其支流的河岸、河滩的植物防护工程进行了调查研究。更多还原

【Abstract】 Youyu county of Shanxi province, being in rolling dune sand area of gentle slopes, run across by Changtou River, is subject to severe erosion both by water and by-winds.The water courses have been broadened and shift frequently. Since 1958, in addition to masonry training walls and check dams in some places, vegetal revetments by means of growing common seabuckthron, dark willow, small-leaved poplar, etc. have been introduced. Forest belts serving as bank protection in the county measure 223 km in total and cover an area of 44000 mu, with marked effects of bed stabilizing, flow retarding, deposit forming and land protecting, so that revetment as such is called "biogenic dams " by the local masses.The authors have made investigations and experiments regarding the growth of trees serving as vegetal revetment, distribution of root systems and their effect on streamflow, attempts to expound the mechanism of scour prevention of vegetal revetment as also suggestions on further sophistication of the layout of works of vegetal bank protection and their utilization.更多还原