论文部分内容阅读
水平梯田是治理坡耕地控制水土流失的有效措施,同时也是山、丘区建设高产稳产农田改变农业生产条件的基础。在进行大面积水平梯田的规划设计时计算工作量较大,为简化计算,我们根据实地调查资料和常用的计算公式,制成“土坎水平梯田规划设计曲线图”,方法简便,可供从事水土保持工作者参考使用。 一、关系图的绘制 采用公式: 田面净宽:B=H(cotα—cotβ) (米) 原坡面宽:B_L=H/sinα(米) 埂占地宽:B_n=H·cotβ(米) 亩土方量:V=83.3H(m~3/亩) 式中:H—地坎高(米)
Horizontal terraces are effective measures to control slope soil erosion and soil erosion, and are also the basis for the construction of high and stable farmland in mountainous and hilly areas to change agricultural production conditions. In the planning and design of large-scale terraced fields, the computational workload is large. To simplify the calculation, we make a “ridge-level terraced landscape planning and design curve” based on the field survey data and commonly used calculation formulas. The method is simple and feasible Soil and water conservation workers for reference. First, the diagram is drawn using the formula: Net clear surface: B = H (cotα-cotβ) (m) The original slope width: B_L = H / sinα Mu Amount of earthwork: V = 83.3H (m ~ 3 / mu) Where: H-ridge high (m)