Bulletin of Surveying and Mapping ›› 2023, Vol. 0 ›› Issue (4): 1-5,15.doi: 10.13474/j.cnki.11-2246.2023.0095

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Continuous multi-temporal monitoring of algae pollution in Nanwan Lake based on high score data

WEN Ye1,2, WANG Songyan1, ZHANG Huan3   

  1. 1. School of Architectural Engineering, City Institute, Dalian University of Technology, Dalian 116600, China;
    2. College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China;
    3. Liaoning Jinpeng Geographic Information Technology Co., Ltd., Shenyang 110000, China
  • Received:2022-04-26 Revised:2023-02-06 Published:2023-04-25

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Abstract: Algae pollution affects water quality and causes significant damage to the ecological environment. In the study of lake green algae pollution, domestic high-resolution and wide-range data are rarely applied. In this paper, the high-spectrum and wide-width data of GF-1 and GF-6 are comprehensively used to monitor the pollution of green algae in Nanwan Lake by using the normalized vegetation index and the normalized vegetation index introducing the red-edged band, and the pollution time and range evolution are determined. The analysis yielded: ①On July 20,2020, there is green algae pollution. ②On August 2 and 3,2020,there is no green algae pollution. ③On August 4,5 and 9,2020,green algae recurred at a bend downstream. The pollution and recurrence of green algae in Nanwan Lake are consistent with the actual situation, indicating that the high-score data has potential for application in the monitoring, extraction accuracy and efficiency of green algae in short-time lakes.

Key words: lake algae monitoring, NDVI, high spatial resolution GF-1 satellite, high spatial resolution GF-6 satellite, red-edge band

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