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以三峡库区、川中丘陵区、云贵高原区、横断山区、秦巴山区为重点区域,通过对坡改梯工程的结构、功能、造价等指标进行对比分析,评估各小流域“坡式梯田+坡面水系”治理模式的水土保持效益,结果显示:坡式梯田具有截短坡长、减缓坡度、动土量少、提高治理速度、节约工程投资等特点,能有效控制坡面水土流失,并且增产作用明显;坡式梯田离不开池、渠、凼配套和蓄、排、灌结合的坡面水系措施,合理布设坡面水系是发挥梯田蓄水保土效益的重要保证。因此,“坡式梯田+水系配套”治理模式是适合长江上游陡坡耕地治理的有效模式。
Taking the Three Gorges Reservoir Area, the Central Sichuan Hilly Area, the Yungui Plateau Area, the Hengduan Mountains Area and the Qinba Mountain Area as the key areas, this paper compares and analyzes the structure, function and cost of the slope-climbing project, + Slope water system “, the results show that: the slope terraces with shortening slope length, slope reduction, soil less, improve the management speed, saving investment and other characteristics of the project, which can effectively control the slope erosion and soil erosion, And the effect of increasing production is obvious. The slope terraces are inseparable from the combination of ponds, channels, Taipa and the combination of storage, drainage and irrigation. Rationally laying slope water system is an important guarantee for water conservancy and soil conservation in terraced fields. Therefore, the ”slope terrace + water system supporting" management mode is an effective mode for steep slope farmland control in the upper reaches of the Yangtze River.