The Soil Conservation Service‐Curve Number (SCS‐CN) method was chosen to calculate the effective precipitation used in hydrological modeling. The assumption of the method is to correlate effective precipitation with the type of land cover, the type of soil and moisture conditions. All these factors include a dimensionless CN parameter. In the analysis, a modification of forest cover was used, taking into account the forest stand feature called the stocking index. Analyses were carried out for the forest catchment of the Łutownia river located in north‐eastern Poland. Model calculations for the analyzed hydrographs using the value of the CN parameter with the stocking index and the original method showed that the optimal value of the CN parameter indicated in the results of model calculations ranged from 42.8 to 43.8. These values were similar to the parameter CN = 43.9 calculated according to the method incorporating the stocking index.

中文翻译：

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将放养指数应用于森林集水区曲线数参数的确定

选择了土壤保持服务曲线编号（SCS-CN）方法来计算水文模型中使用的有效降水量。该方法的假设是将有效降水量与土地覆盖类型，土壤类型和湿度条件相关联。所有这些因素都包括无量纲的CN参数。在分析中，考虑到林分功能（称为放养指数），对森林覆盖率进行了修改。对位于波兰东北部的Łtownia河的森林集水区进行了分析。使用带有蓄水指数的CN参数值和原始方法对所分析水文进行模型计算，结果表明，模型计算结果中指示的CN参数最佳值在42.8至43.8范围内。