基于遥感技术的柘林水库库容曲线复核
|
摘要
针对库容曲线校核时传统方法费时、费力、成本高等问题,以柘林水库为例,利用基于遥感技术的水体信息提取方法,采用71幅Landsat卫星遥感影像图,提取了库区内的水体面积,结合影像成像时间对应的实测水库水位值,根据统计原理拟合了水库死水位至正常蓄水位范围内的水位—面积曲线,据此推算了其水位—库容曲线。而后从遥感影像所用图幅、水体面积量算、曲线配准、水位值的准确度、影像分辨率大小等方面论证了新库容曲线的精度。分析1979—2016年的实测库水位,与原库容曲线相比,在52~65 m级水位下,新库容曲线库容平均比老曲线相应值大4.16%。经检验表明,获取的新曲线精度满足水库调度运行要求,可为柘林水电厂防洪、发电调度运行提供可靠的基础资料。基于遥感技术的水库库容曲线复核方法节约成本、快速高效、准确可靠,具有较大的推广应用前景。
Aiming at the problems that the conventional method for re-checking of reservoir storage capacity curve is time-consuming,strenuous,highly costed,etc.,the reservoir water-body area is extracted,by taking Zhelin Reservoir as the study case,with 71 remote sensing images of Landsat satellite on the basis of the remote sensing technology-based extracting method for waterbody information,and combined with the measured water level of the reservoir when the images photographed,then the water level-area curve of the reservoir within the elevation range of the dead water level and the normal storage level is fitted according to the relevant statistic principle. Thereafter,the accuracy of the new storage capacity curve is verified from the aspects of the dimension of the remote sensing image adopted,water-body area measurement,curve alignment,accuracy of water level value,image resolution,etc. Compared with the original storage capacity curve,the storage from the new storage capacity curve is averagely larger than that from the old one by 4. 16% under the condition of the water level of 52 ~ 65 m measured in 1979-2016.Through the relevant verification,it is indicated that the obtained new curve meets the requirement of the operation of the reservoir,thus can provide a reliable basic data for the flood control and power generation operation of Zhelin Hydropower Plant. The remote sensing technology-based method for re-checking of reservoir storage capacity curve is cost-saving,fast and efficient,accurate and reliable,and then has a large popularization and application prospect.
Aiming at the problems that the conventional method for re-checking of reservoir storage capacity curve is time-consuming,strenuous,highly costed,etc.,the reservoir water-body area is extracted,by taking Zhelin Reservoir as the study case,with 71 remote sensing images of Landsat satellite on the basis of the remote sensing technology-based extracting method for waterbody information,and combined with the measured water level of the reservoir when the images photographed,then the water level-area curve of the reservoir within the elevation range of the dead water level and the normal storage level is fitted according to the relevant statistic principle. Thereafter,the accuracy of the new storage capacity curve is verified from the aspects of the dimension of the remote sensing image adopted,water-body area measurement,curve alignment,accuracy of water level value,image resolution,etc. Compared with the original storage capacity curve,the storage from the new storage capacity curve is averagely larger than that from the old one by 4. 16% under the condition of the water level of 52 ~ 65 m measured in 1979-2016.Through the relevant verification,it is indicated that the obtained new curve meets the requirement of the operation of the reservoir,thus can provide a reliable basic data for the flood control and power generation operation of Zhelin Hydropower Plant. The remote sensing technology-based method for re-checking of reservoir storage capacity curve is cost-saving,fast and efficient,accurate and reliable,and then has a large popularization and application prospect.
引文
[1]王国兴,李士鸿.应用遥感资料获取库区水下地形的方法研究[J].河海大学学报,1998,26(6):91-64.
[2]杨中华,陈琳.基于GIS的水库库容测量方法的研究与实践[J].测绘通报,2002(11):28-30.
[3]王润存.用水量平衡法修正中小型水库库容曲线[J].水文,1983(1):26-28.
[4]刘德忠.用水量平衡法率定水库库容曲线初探[J].水文,1999(S1):6-9.
[5]苏业助,洪为善.根据水量平衡原理修正水库库容曲线方法[J].人民长江,1999,30(12):39-41.
[6]陆桂华,王卫平,罗健.一种确定水库库容曲线的新方法[J].水文,1997(1):38-41.
[7]余赛英.NGD-60实时动态差分GPS测量系统在水库库容测量中的应用[J].水利科技,2001(3):32-34.
[8]李俊.GPSRTK技术测量水库库容曲线[J].人民珠江,2010,31(3):9,24.
[9]陆家驹,何长利.卫星遥感复测丰满水库库容曲线[J].水利水运工程学报,2003,12(4):60-63.
[10]王国兴,李士鸿.应用遥感资料获取库区水下地形的方法研究[J].河海大学学报,1998,26(6):91-94.
[11]陈曦,裴毅,姚帮松,等.水位库容曲线的卫星影像测定方法研究[J].人民长江,2013,44(20):25-28.
[12]陆家驹,李士鸿,陈鸣,等.利用卫星遥感资料复核水库库容曲线[J].华东电力,1994(6):21-22.
[13]朱长明,张新,路明,等.湖盆数据未知的湖泊动态库容遥感监测方法[J].测绘学报,2015,44(3):309-315.
[14]齐述华,龚俊,舒晓波,等.鄱阳湖淹没范围、水深和库容的遥感研究[J].人民长江,2010,41(9):35-38.
[15]MCFEETERS S K.The use of Normalized Difference Water Index(NDWI)in the delineation of open water features[J].International journal of remote sensing,1996,17(7):1425-1432.
[16]唐海华,丁杰.河道型水库动库容问题初探[J].水电自动化与大坝监测,2009,33(5):75-77.
[2]杨中华,陈琳.基于GIS的水库库容测量方法的研究与实践[J].测绘通报,2002(11):28-30.
[3]王润存.用水量平衡法修正中小型水库库容曲线[J].水文,1983(1):26-28.
[4]刘德忠.用水量平衡法率定水库库容曲线初探[J].水文,1999(S1):6-9.
[5]苏业助,洪为善.根据水量平衡原理修正水库库容曲线方法[J].人民长江,1999,30(12):39-41.
[6]陆桂华,王卫平,罗健.一种确定水库库容曲线的新方法[J].水文,1997(1):38-41.
[7]余赛英.NGD-60实时动态差分GPS测量系统在水库库容测量中的应用[J].水利科技,2001(3):32-34.
[8]李俊.GPSRTK技术测量水库库容曲线[J].人民珠江,2010,31(3):9,24.
[9]陆家驹,何长利.卫星遥感复测丰满水库库容曲线[J].水利水运工程学报,2003,12(4):60-63.
[10]王国兴,李士鸿.应用遥感资料获取库区水下地形的方法研究[J].河海大学学报,1998,26(6):91-94.
[11]陈曦,裴毅,姚帮松,等.水位库容曲线的卫星影像测定方法研究[J].人民长江,2013,44(20):25-28.
[12]陆家驹,李士鸿,陈鸣,等.利用卫星遥感资料复核水库库容曲线[J].华东电力,1994(6):21-22.
[13]朱长明,张新,路明,等.湖盆数据未知的湖泊动态库容遥感监测方法[J].测绘学报,2015,44(3):309-315.
[14]齐述华,龚俊,舒晓波,等.鄱阳湖淹没范围、水深和库容的遥感研究[J].人民长江,2010,41(9):35-38.
[15]MCFEETERS S K.The use of Normalized Difference Water Index(NDWI)in the delineation of open water features[J].International journal of remote sensing,1996,17(7):1425-1432.
[16]唐海华,丁杰.河道型水库动库容问题初探[J].水电自动化与大坝监测,2009,33(5):75-77.