搜索结果: 1-12 共查到“水文学 MODIS”相关记录12条 . 查询时间(0.078 秒)
随着经济社会的快速发展和进步,我国湖库水体富营养化情况越来越严重.卫星遥感在水体营养状态监测方面具有重要潜力,但基于卫星遥感的全国范围内湖库水体营养状态监测和分析方面还鲜有研究.本文基于2018夏季的MODIS卫星遥感数据生产FUI指数产品,构建基于FUI水色指数的湖库营养状态评价方法,监测全国范围内144个重点湖库水体的营养状态等级.结果表明:贫营养、中营养、富营养的湖库比例分别为16%、24%...
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研究表明,对于浅水浑浊湖泊,水柱中悬浮颗粒物(TSM)对光吸收和散射决定了真光层深度,并进一步决定了水生植被的空间分布。此外,TSM是水体重金属和营养盐的重要载体,决定着这些物质的迁移和转化。因此,TSM时空变化信息对于湖泊水体,特别是大型浅水湖泊光学、生物地球化学循环以及湖泊生态系统演化的研究具有重要意义。遥感技术自身的优势使其成为获取TSM时空变化强有力的工具。在国家杰出青年基金等项目联合资助...
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基于MODIS影像的太湖水体总悬浮物浓度时空变化研究取得重要进展(图)
MODIS影像 湖水 悬浮物
2015/3/25
研究表明,对于浅水浑浊湖泊,水柱中悬浮颗粒物(TSM)对光吸收和散射决定了真光层深度,并进一步决定了水生植被的空间分布。此外,TSM是水体重金属和营养盐的重要载体,决定着这些物质的迁移和转化。因此,TSM时空变化信息对于湖泊水体,特别是大型浅水湖泊光学,生物地球化学循环以及湖泊生态系统演化的研究具有重要意义。遥感技术自身的优势使其成为获取TSM时空变化强有力的工具。在国家杰出青年基金等项目联合资助...
有效地提取蓝藻水华信息对分析蓝藻动态分布有重要意义,然而低空间分辨率数据提取的蓝藻水华会产生尺度误差. 本文以太湖为研究区,利用2005年10月17日和2010年12月3日两景MODIS(250和500m)数据,采用浮游藻类指数(FAI)法提取太湖蓝藻水华面积;通过将FAI250均值化为FAImean(500m),然后与FAI500比较,从像元角度定量评价FAI的尺度误差,分析引起提取误差的原因....
Regional estimation of daily to annual regional evapotranspiration with MODIS data in the Yellow River Delta wetland
Evapotranspiration Yellow River Delta daily annual
2009/10/10
Evapotranspiration (ET) from the wetland of the Yellow River Delta (YRD) is one of the important components in the water cycle, which represents the water consumption by the plants and evaporation fro...
本文提出了一种采用海面离水辐射率和泥沙粒径二元特征参数来反演研究海区(渤海)海洋表层悬浮泥沙浓度的新的遥感反演算法,以此为基础分别建立了基于MODIS遥感数据和泥沙粒径二元特征参数的主成分和神经网络两种泥沙浓度反演模型,并对比分析了两类模型的反演精度以及泥沙粒径因子对模型的影响。分析结果表明,新建立的二元特征参数反演算法在采用主成分模型和神经网络模型时的检验误差分别为0.256和0.244,而忽略...
Interrelationships between MODIS/Terra remotely sensed snow cover and the hydrometeorology of the Quesnel River Basin, British Columbia, Canada
MODIS/Terra snow cover hydrometeorology
2009/9/11
A spatial filter (SF) method is adopted to reduce the cloud coverage from the Moderate Resolution Imaging Spectroradiometer (MODIS) 8-day snow products (MOD10A2) between 2000–2007 in the Quesnel River...
Estimating spatially distributed monthly evapotranspiration rates by linear transformations of MODIS daytime land surface temperature data
evapotranspiration rates land surface temperature
2009/7/22
Under simplifying conditions catchment-scale vapor pressure at the drying land surface can be calculated as a function of its watershed-representative temperature () by the wet-surface equation (W...
Commentary on comparison of MODIS snow cover and albedo products with ground observations over the mountainous terrain of Turkey
snow water equivalent MODerate-resolution Imaging Spectroradiometer automated weather operating stations
2009/5/12
The MODerate-resolution Imaging Spectroradiometer (MODIS) snow cover product was evaluated by Parajka and Blösch (2006) over the territory of Austria. The spatial and temporal variability of the...
Commentary on comparison of MODIS snow cover and albedo products with ground observations over the mountainous terrain of Turkey
MODerate-resolution Imaging Spectroradiometer snow water equivalent automated weather operating stations
2009/5/8
The MODerate-resolution Imaging Spectroradiometer (MODIS) snow cover product was evaluated by Parajka and Blösch (2006) over the territory of Austria. The spatial and temporal variability of the ...
Topographic control of snow distribution in an alpine watershed of western Canada inferred from spatially-filtered MODIS snow products
snow cover fraction Quesnel River Basin snow cover duration
2009/4/28
A spatial filter (SF) is used to reduce cloud coverage in Moderate Resolution Imaging Spectroradiometer (MODIS) 8-day maximum snow cover extent products (MOD10A2) from 2000–2007, which are obtained fr...
应用Terra/MODIS卫星数据估算洞庭湖蓄水量的变化
2007/8/24
以洞庭湖为例,利用2002年的美国Terra/MODIS卫星数据,以16天为周期将全年划分为23个时段,分别对湖区水位和蓄水量分布特征和变化规律进行动态监测和综合分析。具体测算方法包括以下4个步骤: (1) 根据湖区特性,将整个洞庭湖分为3个部分:自西向东依此是西洞庭湖 (WDL), 南洞庭湖 (SDL) 和东洞庭湖 (EDL)。这3个部分的蓄水量之和就是整个洞庭湖的总蓄水...