isohyetal method的用法和样例：
例句
- The method improves the precision of the precipitation isoline and is important to count the surface precipitation of the drainage area.
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。 - The semivariogram models built by former analysis used as the input functions for Kriging that making isohyetal maps by integrating GIS.
为具体表现本区之台风降雨空间分布之情形，遂以前项所得之半变异函数作为克利金推估之输入函数，并应用地理资讯系统建立等雨量线分布图。
