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一 概况 永定河由于流域的地质、地形、气候及山林被毁等原因,致使成为全国含砂量最大的河流之一。其河道淤积严重,历史上曾多次决口改道,洪水泛滥。又因冬春季节地表干燥,风吹砂起,灾害频仍,农业生产低而不稳,种不保收,人民生活十分贫穷。 建国初期,在人民政府领导下,于一九五二年在全泛区范围内设计和营造了防护林网,基本上锁住了风沙,稳定了农业生产。试区所在地王玛、赵格庄等村落,自一九五八年以
At a Glance Yongding River has become one of the rivers with the largest amount of sand in the country because of the geology, topography, climate and destroyed forests. Serious siltation of the river, history has repeatedly burst out diversions, flooding. Due to the surface dryness during the spring and winter, wind and sand, frequent disasters, low and unsustainable agricultural production, lack of income and poor people’s livelihood. In the early days of the founding of New China, under the leadership of the People’s Government, the shelterbelts network was designed and constructed in a pan-Pan-European area in 1952, basically locking in wind and sand and stabilizing agricultural production. Test area is located Wangma, Zhao Ge Zhuang and other villages, since 1958 to