qgis:raster-surface-volume

 qgis:raster-surface-volume

 rasterize-vector-to-raster 

TIN Interpolation 

https://ocw.un-ihe.org/mod/book/view.php?id=6788&chapterid=578 

 https://github.com/jvdkwast/PyQGIS_Hydro/blob/master/scripts/StageVolume.py

 import numpy as np
levels = np.arange(12.9,20.0,0.5).tolist()
for i_level in levels:
    r = processing.run("native:rastersurfacevolume", {'INPUT':'OUTPUT.tif','BAND':1,'LEVEL':i_level,'METHOD':1,'OUTPUT_HTML_FILE':'Skip Output'})
    print('{}:{}:{}'.format(i_level,round(abs(r['VOLUME']/10**8),2),round(r['AREA']/10**6,2)))
   

  Hypsometric Curve

How do I read the hypsometric curve? 

Hypsographic Curve of Earth's Surface from ETOPO1 

Elevation and Volume relationship curve in QGIS 

Create a Stage Volume Curve 

iterative_model 

https://gdal.org/programs/gdal_rasterize.html 

ArcGIS水文分析实战教程（8）水库库容计算