水文计算（hydrological computation）为防洪、水资源开发和某些工程的规划、设计、施工和运行提供水文数据的各类水文分析和计算的总称。
正确估计地下径流过程是水文计算和预报中的一项基础性工作。
How to compute groundwater runoff correctly is the basic re - search subject in hydrological calculation.
利用水力水文计算基本原理，研究了竖曲线内桥面泄水孔间距。
This paper studied the design of scupper spacing of deck in vertical curve with the basic principle of hydraulic and hydrologic compute.
通过桥渡水文计算，确定了设防流量及设防水位，校核了大桥主要特征值；
The designed discharge and designed flood level are determined by hydrological computation and main characteristic value of highway bridge is checked.
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