Abstract
The Tarim River Basin (TRB), located in an arid region, is facing the challenge of increasing water pressure and uncertain impacts of climate change. Many water body identification methods have achieved good results in different application scenarios, but only a few for arid areas. An arid region water detection rule (ARWDR) was proposed by combining vegetation index and water index. Taking computing advantages of the Google Earth Engine (GEE) cloud platform, 56,284 Landsat 5/7/8 optical images in the TRB were used to detect open-surface water bodies and generated a 30-m annual water frequency map from 1992 to 2019. The interannual changes and trends of the water body area were analyzed and the impacts of climatic and anthropogenic drivers on open-surface water body area dynamics were examined. The results show that: (1) ARWDR is suitable for long-term and large-scale water body identification, especially suitable for arid areas lacking vegetation. (2) The permanent water area was 2093.63 km2 and the seasonal water area was 44,242.80 km2, accounting for 4.52% and 95.48% of the total open-surface water area of he TRB, respectively. (3) From 1992 to 2019, the permanent and seasonal water bodies of the TRB all showed an increasing trend, with obvious spatial heterogeneity. (4) Among the effects of human activities and climate change, precipitation has the largest impact on the water area, which can explain 65.3% of the change of water body area. Our findings provide valuable information for the entire TRB’s open-surface water resources planning and management.
Highlights
Open-surface water bodies, including lakes, rivers, streams, reservoirs, and ponds, are extremely important water resources for agriculture, aquaculture, industrial production, aquatic, and terrestrial ecosystems [1]
To compare the accuracy of arid region water detection rule (ARWDR) and other water body identification methods on Tarim River Basin (TRB), six Landsat tiles with less than 1% cloud cover in the TRB were selected for this study. they cover various land types and typical water bodies in the TRB, including Lake Bosten, Lake Tetema, Daxihaizi
Each image was de-clouded by the Fmask algorithm [65], and six bands of the Landsat 5, 7, and 8 surface reflectance image data, including blue band, green band, red band, near-infrared band, short-wave infrared 1 band, and short-wave infrared 2 band, were selected
Summary
Open-surface water bodies, including lakes, rivers, streams, reservoirs, and ponds, are extremely important water resources for agriculture, aquaculture, industrial production, aquatic, and terrestrial ecosystems [1]. Climate change and increased climate variability can strongly impact open-surface water resources [3,4,5], causing significant intraand inter-annual water bodies area changes [6,7]. Due to climate change and human activities, permanent water bodies have been reduced by nearly 90,000 km2 , 2.02% of the all water bodies from 1984 to 2015 [8]. Changes in surface water caused by human activities strongly affect surface temperature, soil moisture, biodiversity, and ecosystem functions [9]. Monitoring the dynamic changes of open-surface water is of great significance to the health of the natural environment and the sustainable development of the social economy [10]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
