Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.5194/isprsarchives-XLI-B8-403-2016 |
SPATIOTEMPORAL DYNAMICS OF SURFACE WATER EXTENT FROM THREE DECADES OF SEASONALLY CONTINUOUS LANDSAT TIME SERIES AT SUBCONTINENTAL | |
Tulbure, M. G.1; Broich, M.1; Stehman, Stephen V.2 | |
通讯作者 | Tulbure, M. G. |
会议名称 | 23rd Congress of the International-Society-for-Photogrammetry-and-Remote-Sensing (ISPRS) |
会议日期 | JUL 12-19, 2016 |
会议地点 | Prague, CZECH REPUBLIC |
英文摘要 | Surface water is a critical resource in semi-arid areas. The Murray-Darling Basin (MDB) of Australia, one of the largest semi-arid basins in the world is aiming to set a worldwide example of how to balance multiple interests (i.e. environment, agriculture and urban use), but has suffered significant water shrinkages during the Millennium Drought (1999-2009), followed by extensive flooding. Baseline information and systematic quantification of surface water (SW) extent and flooding dynamics in space and time are needed for managing SW resources across the basin but are currently lacking. To synoptically quantify changes in SW extent and flooding dynamics over MDB, we used seasonally continuous Landsat TM and ETM+ data (1986 - 2011) and generic machine learning algorithms. We further mapped flooded forest at a riparian forest site that experienced severe tree dieback due to changes in flooding regime. We used a stratified sampling design to assess the accuracy of the SW product across time. Accuracy assessment yielded an overall classification accuracy of 99.94%, with producer's and user's accuracy of SW of 85.4% and 97.3%, respectively. Overall accuracy was the same for Landsat 5 and 7 data but user's and producer's accuracy of water were higher for Landsat 7 than 5 data and stable over time Our validated results document a rapid loss in SW bodies. The number, size, and total area of SW showed high seasonal variability with highest numbers in winter and lowest numbers in summer. SW extent per season per year showed high interannual and seasonal variability, with low seasonal variability during the Millennium Drought. Examples of current uses of the new dataset will be presented and include (1) assessing ecosystem response to flooding with implications for environmental water releases, one of the largest investment in environment in Australia; (2) quantifying drivers of SW dynamics (e.g. climate, human activity); (3) quantifying changes in SW dynamics and connectivity for water dependent organisms; (4) assessing the impact of flooding on riparian vegetation health. The approach developed here is globally applicable, relevant to areas with competing water demands (e.g. Okavango River delta, Mekong River Basin). Future work should incorporate Landsat 8 and Sentinel-2 data for continued quantification of SW dynamics. |
英文关键词 | Landsat time-series seasonally continuous surface water dynamics flooding dynamics Murray-Darling Basin Australia competing water demands drought random forest long term trends water river basin water management |
来源出版物 | XXIII ISPRS CONGRESS, COMMISSION VIII |
ISSN | 2194-9034 |
出版年 | 2016 |
卷号 | 41 |
期号 | B8 |
页码 | 403-+ |
EISBN | ***************** |
出版者 | COPERNICUS GESELLSCHAFT MBH |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Australia;USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000393156000068 |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Remote Sensing |
WOS研究方向 | Physical Geography ; Geology ; Meteorology & Atmospheric Sciences ; Remote Sensing |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/304971 |
作者单位 | 1.Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW, Australia; 2.SUNY Syracuse, Dept Forest & Nat Resources Management, Syracuse, NY USA |
推荐引用方式 GB/T 7714 | Tulbure, M. G.,Broich, M.,Stehman, Stephen V.. SPATIOTEMPORAL DYNAMICS OF SURFACE WATER EXTENT FROM THREE DECADES OF SEASONALLY CONTINUOUS LANDSAT TIME SERIES AT SUBCONTINENTAL[C]:COPERNICUS GESELLSCHAFT MBH,2016:403-+. |
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