平原河渠过水能力的直接算法

遵从平原河网地区河渠抽水水力特性，从基本的能量方程入手，导出明渠渐变流基本微分方程，进而将该方程改写为水位沿程变化的微分式，再变微分为差分，推演出平原河渠过水流量的直接计算方式，该公式对棱柱体或非棱柱体河渠以及任一种底坡均可适用，且具有计算方便、成果精确且符合抽水流态特性等优点。对习惯算法的由来也作了简要叙述并与直接算法进行了比较。

Direct Algorithm about Channels Transport Water Capability in Plain

Based on the hydraulic characteristics of pump water in plain channels,the author puts forward the direct calculation formula about transport discharge in plain channels begin with the basic energy equation This formula is applicable to prismatic channels,un-prismatic channels and any type gradient of bottom Passing through engineering example calculating,convenience and high precision are expected in direct method The cause of cxisting method is also concise accounted