Applicability of the Surface Water Extraction Methods Based on China’S GF-2 HD Satellite in Ussuri River, Tonghe County of Northeast China
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p-ISSN: 0972-6268 Nature Environment and Pollution Technology (Print copies up to 2016) Vol. 19 No. 4 pp. 1537-1545 2020 An International Quarterly Scientific Journal e-ISSN: 2395-3454 Original Research Paper Originalhttps://doi.org/10.46488/NEPT.2020.v19i04.020 Research Paper Open Access Journal Applicability of the Surface Water Extraction Methods Based on China’s GF-2 HD Satellite in Ussuri River, Tonghe County of Northeast China Wenfeng Gong*, Tiedong Liu*†, Yan Jiang** and Philip Stott*** *College of Forestry, Hainan University, Haikou 570228, China **College of Hydraulic and Electrical Engineering, Heilongjiang University, Harbin 150086, China ***School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy 5371, Australia †Corresponding author: Tiedong Liu; [email protected] ABSTRACT Nat. Env. & Poll. Tech. Website: www.neptjournal.com Surface water is the most important and common water resource on earth. Accurate and effective Received: 03-12-2019 mapping and detecting of surface water have been made possible by remote sensing technology, high- Revised: 20-12-2019 resolution satellite data, playing an important role in surface water monitoring and mapping, which has Accepted: 01-03-2020 become the current hot research for water information extraction in recent decades. Therefore, in this paper, we tested and analysed four models to extract water bodies using China’s GF-2 HD satellite (GF- Key Words: 2) image, including Normalized Difference Water Index (NDWI), Modified Shadow Water Index (MSWI), Surface water extraction Support Vector Machine (SVM) and Object-Oriented Method (OOM). The results showed applying GF-2 satellite water extraction models can map surface water with an overall accuracy of 0.8935, 0.9256, 0.9467 and Water index 0.9357, respectively. SVM owns the highest overall accuracy value of 0.9467, followed by OOM. SVM Support vector machine performed significantly better at surface water extraction with kappa coefficients improved by 9.00%, 5.00%, and 2.00%, respectively, which yielded the best results and used to map surfaces water bodies in the study region, while index methods (NDWI and MSWI) are mostly classified into the water and non-water information based on a threshold value, with higher total omission and commission errors at 12.45%, 25.64%, 6.38% and12.87%, respectively. Therefore, we proposed SVM as the best algorithm to identify water body and effectively detect surface water from the GF-2 image. INTRODUCTION Lee et al. 2018). Waterbody information, as an important constituent of remote sensing image, has become the vi- Surface water is one of the vital components of the earth’s tal national geo-information and can be automatically or environment, which is not only the essential for the sur- semi-automatically extracted by integrating remote sensing vival of living beings (Vorosmarty et al. 2000), but also is data with geographic information systems (GIS). Meanwhile, the important basic information for land use/cover change in recent decades, accurate and effective extracting water (LUCC), climate changes, seasonal changes, and environ- from remote sensing data has become indispensable ways mental changes throughout of the world (Alamgir et al. 2016, for the development and utilization of water resources (Du Araral & Wu 2016). Therefore, knowledge of the spatial & Zhou 1998), which also becomes an important branch of distribution of surface water is imperative for assessment remote sensing applications. of water resources, watershed changes, land surface water Due to the ease of processing and obtaining satellite management and environmental monitoring (NRC 2008, Sun image data (Masocha et al. 2018), numerous surface water et al. 2012). Besides, timely monitoring and delivering data extraction algorithms have been developed and applied for re- on the dynamics of surface water are essential for policy and motely sensed imageries (Borton 1989), which focused on the decision-making processes (Frey et al. 2010), especially for following satellite sensors with the different spatial, temporal monitoring floods risk at an emergency. and spectral resolution, including the Moderate-Resolution Remote sensing has advantages of the macroscopic, Imaging Spectro-radio-meter (MODIS) (Khandelwal et al. real-time, periodic repeatability, dynamic access to the land 2017, Ovakoglou et al. 2016), Satellite Pour l’ Observation surface information (Lu et al. 2011), which can provide low- dela Terre (SPOT) (Ji et al. 2009), Advanced Spaceborne cost and reliable information for environmental changes at Thermal Emission and Reflection Radiometer (ASTER) local, regional, and global scales, with their long-collected (Huang et al. 2008 ), Advanced Very High Resolution Ra- repeatable and even real-time data (Melesse et al. 2007, diometer (AVHRR) (Zhou et al. 1996), Thematic Mapper 1538 Wenfeng Gong et al. esciy Ussuri Rir betwee i a ussia. series dataHence (MSS,TM,ETM+ i is paper and OLI) (Acharyaalgris et al. have 2018, e rsHence, in this r paper, iiyig the algorithms ar have is been iproposed AlanaziGF &-2 Ghrefa iui 2013, Alesheikhwater body et al. iex2007, Senay s et al. 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