等雨量线的自动绘制方法

Automatism Protract Precipitation Isoline

针对雨量站点及等雨量线的特征,讨论了一种新的等雨量线追踪途径。该方法首先用二次曲面对不规则站点雨量进行格网化,然后在格网上对等雨量点进行判断、追踪以及在追踪过程中如何消除追踪的二义性。最后对开曲等雨量线和闭曲等雨量线的起点、终点进行了判断。结果表明该方法提高了绘制等雨量线的质量,对于计算流域的面雨量具有重要实际意义。

A new method of tracing precipitation isoline is introduced in term of the character of rain spot and isoline. The method, firstly, grids the precipitation amount by conicoid, then judges and traces isoline and brings forward a way of how to avoid connection uncertainty of isoline. Lastly, jumping-off and end point of opening-curve, and close isoline were judged. The method improves the precision of the precipitation isoline and is important to count the surface precipitation of the drainage area.