Enter water-level/area pairs to fit a level-capacity curve by trapezoidal integration, and query the storage volume at any water level for reservoir operation and water-supply planning.
输入多组水位-面积数据,梯形法积分拟合水位-库容曲线,查询任意水位对应库容
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Prismoidal formula | V = ( A1 + A2 + sqrt(A1·A2) ) · ΔH / 3 between two contour levels | GB 50026-2020, Code for engineering surveying |
| Area-elevation curve | Derived from contour areas and elevations; it is the basis of the capacity curve | GB 50026-2020, Code for engineering surveying |
| Curve fitting | The capacity-level relation is usually fitted by least squares | Gauss CF (1809), Theoria Motus Corporum Coelestium, least squares |
| Goodness of fit | The coefficient of determination R-squared measures the fit; nearer 1 is better | NIST/SEMATECH e-Handbook of Statistical Methods §1.3.5.3 |
库容曲线拟合工具用于建立水位与库容的关系曲线。通过输入实测的水位-面积数据,采用梯形法数值积分计算各水位对应的累积库容,并支持查询任意水位下的库容值,是水库规划、调洪演算的重要基础。