沙棘林护岸工程在河道整治中的应用

Application of Bank Protective Engineering of the Seabuckthorn Forests in River Improvement

本文以山西省右玉县苍头河为例,通过对1959年和1978年的航摄相片的解译,得出两个年代间的苍头河地貌特征和两岸滩地上沙棘林的变化,系统地评价了沙棘护岸工程在流路归整、截弯取直等方面的作用。同时用模糊模式识别法,对苍头河两个年代的20个典型河段进行河型判别。结果表明,护岸工程形成以后,苍头河河型由散乱型——曲流型——顺直型发展。

River improvement using bio-engineering measures is one of the important parts of soil and water conservation in a watershed.The ecological,economic and social value it contributes is being given increasing attention.Results of the geomorphic characteristics of the Cangtou river in Youyu county,Shanxi province,obtained by interpretating two cases of aerial photographs taken in 1959 and 1978,show that.(1) the bio-engineering measures used on the Cangtou riverbank not only caused the river bed section from a wide-shallow pattern to a narrow-deep one,but also changed the eroded bank from a high cliff pattern to gently sloping one.(2) as the bank protective forest grows,the river pattern of the Cangtou river progressively changes from a braided and winding pattern into a straight pattern.(3) bio-engineering of seabuckthorn is a low-cost,high-profit measure for river improvement and its use should be extended to northwest China