气候变化领域集成服务门户(CCPortal): Surface water monitoring in small water bodies: Potential and limits of multi-sensor Landsat time series

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DOI	10.5194/hess-22-4349-2018
	Surface water monitoring in small water bodies: Potential and limits of multi-sensor Landsat time series
	Ogilvie A.; Belaud G.; Massuel S.; Mulligan M.; Le Goulven P.; Calvez R.
发表日期	2018
ISSN	1027-5606
起始页码	4349
结束页码	4380
卷号	22 期号:8
英文摘要	Hydrometric monitoring of small water bodies (1-10 ha) remains rare, due to their limited size and large numbers, preventing accurate assessments of their agricultural potential or their cumulative influence in watershed hydrology. Landsat imagery has shown its potential to support mapping of small water bodies, but the influence of their limited surface areas, vegetation growth, and rapid flood dynamics on long-Term surface water monitoring remains unquantified. A semi-Automated method is developed here to assess and optimize the potential of multi-sensor Landsat time series to monitor surface water extent and mean water availability in these small water bodies. Extensive hydrometric field data (1999-2014) for seven small reservoirs within the Merguellil catchment in central Tunisia and SPOT imagery are used to calibrate the method and explore its limits. The Modified Normalised Difference Water Index (MNDWI) is shown out of six commonly used water detection indices to provide high overall accuracy and threshold stability during high and low floods, leading to a mean surface area error below 15 %. Applied to 546 Landsat 5, 7, and 8 images over 1999-2014, the method reproduces surface water extent variations across small lakes with high skill (R2 Combining double low line 0.9) and a mean root mean square error (RMSE) of 9300 m2. Comparison with published global water datasets reveals a mean RMSE of 21 800 m2 (+134 %) on the same lakes and highlights the value of a tailored MNDWI approach to improve hydrological monitoring in small lakes and reduce omission errors of flooded vegetation. The rise in relative errors due to the larger proportion and influence of mixed pixels restricts surface water monitoring below 3 ha with Landsat (Normalised RMSE Combining double low line 27 %). Interferences from clouds and scan line corrector failure on ETM+ after 2003 also decrease the number of operational images by 51 %, reducing performance on lakes with rapid flood declines. Combining Landsat observations with 10 m pansharpened Sentinel-2 imagery further reduces RMSE to 5200 m2, displaying the increased opportunities for surface water monitoring in small water bodies after 2015. © Author(s) 2018.
语种	英语
scopus关键词	Catchments; Errors; Floods; Lakes; Mean square error; Monitoring; Time series; Vegetation; Cumulative influence; Hydrological monitoring; Landsat time series; Root mean square errors; Scan line correctors; Threshold stability; Water availability; Watershed hydrology; Reservoirs (water); data set; Landsat; mapping method; monitoring; pixel; satellite data; Sentinel; SPOT; surface water; time series analysis; watershed; Merguellil Basin; Tunisia
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159940
作者单位	Ogilvie, A., G-EAU AgroParisTech, Cirad, IRD, IRSTEA, Montpellier SupAgro, Univ Montpellier, Montpellier, France, Department of Geography, King's College London, London, WC2R 2LS, United Kingdom; Belaud, G., G-EAU AgroParisTech, Cirad, IRD, IRSTEA, Montpellier SupAgro, Univ Montpellier, Montpellier, France; Massuel, S., G-EAU AgroParisTech, Cirad, IRD, IRSTEA, Montpellier SupAgro, Univ Montpellier, Montpellier, France; Mulligan, M., Department of Geography, King's College London, London, WC2R 2LS, United Kingdom; Le Goulven, P., G-EAU AgroParisTech, Cirad, IRD, IRSTEA, Montpellier SupAgro, Univ Montpellier, Montpellier, France; Calvez, R., G-EAU AgroParisTech, Cirad, IRD, IRSTEA, Montpellier SupAgro, Univ Montpellier, Montpellier, France
推荐引用方式 GB/T 7714	Ogilvie A.,Belaud G.,Massuel S.,et al. Surface water monitoring in small water bodies: Potential and limits of multi-sensor Landsat time series[J],2018,22(8).
APA	Ogilvie A.,Belaud G.,Massuel S.,Mulligan M.,Le Goulven P.,&Calvez R..(2018).Surface water monitoring in small water bodies: Potential and limits of multi-sensor Landsat time series.Hydrology and Earth System Sciences,22(8).
MLA	Ogilvie A.,et al."Surface water monitoring in small water bodies: Potential and limits of multi-sensor Landsat time series".Hydrology and Earth System Sciences 22.8(2018).