基于Sentinel-2遥感影像的水库库容曲线快速构建

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中图分类号：TV123；TP79 文献标识码：A 文章编号：1001-9235（2025）07-0086-15

Abstract：Asasetofautomated process hasnotyet been formed forconstructing reservoircapacitycurvesusingremotesensing technology，itisproposedtodeterineteptialtresholdwiththeinflectiopontmethodoftheumulativefrequncycurebsd onthewaterbodyindexmethod.Theedgeofthe waterbodyisoptimizedbytheregionalseedgrowthalgorithm，soastoconstructa completesetofautomatedprocess toquicklyconstruct thereservoircapacitycurves．Withentinel-2remotesensingimagesasthe datasourceadCheguReservoirinWuanCityHandanCityHebeiProvinceasteresearchbect，tispaperusesielandadater image metrics，amely，NDWMDWI，RWI，BWndAWEInshtoextracttheareaofthewaterbodyostructteeor capacitycurve，andcompareitwiththeresultsofthemeasurementsin2O17.Theresultsareasfollows.Theextractionaccuracyof NDWI and RWI waterbody index is high.The average error of Chegu water body area extraction is 2. 5% . The relative error is -7 3% } （20 5.8% and -6 2% ～4. 7% ， and the R2 is O.993 36 and O.990 49，respectively. The range of the relative error of the reservoir capacity is -9 4% to -1 8% and -9 3% to -1. 7% ，respectively. The study shows that the cumulative frequency curve inflection point method ishighlyaplicableandstableindeterminingtheoptimalthresholdof waterbodyindex，withasimpleandfeasibleprinciple.The regionalsedgrowthalgorithmcanefectivelyeliminatethediscontinuityattheedgeofthewaterbody，reducesystematiceo，nd furtherimprovetheaccuracy.Thecumulativefrequencycurveinflectionpointmethodprovidesanewideaforremotesensingwater bodyextraction，servingasareferenceforthebatchconstructionofnationalsmallandmedium-sizedreservoircapacitycurve extraction.

Keywords：sentinel-2;water Index; inflectionpointmethodofthecumulativefrequencycurve;growthalgorithm;storageapacity curve; Chegu Reservoir

水库是流域防洪工程体系的重要组成部分，是国家水网重要结点，是保障国家水安全的重要基础设施。（剩余14621字）