陇南土石山区水土流失格局及分区防治研究

Study on soil and water loss patterns in soil-rock mountain area of south Gansu Province and its divisional-control strategies

陇南土石山区是长江上游典型的水土流失生态脆弱区,经过国家"长治"工程多年治理,水土流失加剧的趋势得到了有效控制,但该区水土流失面积大,自然环境条件恶劣,综合治理任重道远。在分析陇南土石山区水土流失的现状、空间分异格局及特点的基础上,结合现代生态文明建设和水土保持先进理念,研究探索了该区水土流失分区防治对策。研究认为,陇南土石山区水土流失分区治理本质取决于人们从事农业生产活动的主观能动性受自然地理环境的约束限度。当前,注重分区防治战略规划,保障经费及人力投入,并形成长效机制,是保障治理取得显著成效的重中之重,更是巩固"长治"工程巨大成就的迫切需求。

The soil - rock mountain area in south Gansu Province is the typical ecological fragile zone in upper Yangtze River. Benefiting from the Yangtze River Upstream Soil Water Loss Harnessing Projects for many years, the increasing trend in soil and water loss has been effectively controlled, but the large soil erosion area and the harsh natural conditions make the governance task tremendous. On the basis of analyzing the present situation, spatial differential characteristics of soil and water loss in soil - rock mountain area, the divisional - control strategies for this area are studied in combination with advanced concepts of modem ecological civilization construction and soil -water conservation. The analysis results indicate that the key to divisional govern- ance is depending on constraining degree of subjective initiative of people engaged in agricultural production by the natural geo- graphical environment. At present, emphasizing the strategic planning of classified management, guaranteeing investment as well as manpower, and establishing long - term mechanism are the most important measures to control the water and soil loss in soil - rock mountain area of Gansu province in the future, is even more the urgent need to consolidate the achievements of Yangtze Riv- er Upstream Soil Water Loss Harnessing Projects.