Investigating the effect of changes in the water zone of Teham Dam on land use type and land surface temperature using NDWI, MNDWI and AWEI spectral indices and SVM support vector machine in the period from 2002 to 2023

Articles in Press

Document Type : پژوهشی

Author

university of zanjan

Abstract

Spatial and temporal changes of surface water affect the structure and functioning of the ecosystems of the Teham Dam region as well as the agricultural, economic and social development in this region. In this research, MNDWI, AWEI and NDWI indices and SVM support vector machine model was used to detect the long-term changes of Teham Dam in the period from 2002 to 2023. The results of the AWEI index showed that the area of the dam was about 2.4 square kilometers in 2007, which decreased to 1.15 square kilometers in 2023. In the MNDWI index, in 2007 and 2023, the area of water was equal to 2.6 and 1.17 square kilometers, respectively. The NDWI map shows a 46.38% decrease in the area of the water zone from 2007 to 2023. But in the AWEI index, this decrease was equal to 47.9. AWEI index with kappa values equal to 0.94 has correctly recognized the boundaries of water areas. According to the SVM model, in this period of time, the amount of vegetation has decreased from 0.8 square kilometers in 2002 to 0.07 square kilometers in 2023. The amount of barren land has decreased almost in this period of time and was equal to 4.57 square kilometers in 2023. The maximum temperature of the earth's surface in July 2002 was equal to 38.3 degrees Celsius and in July 2023 it reached 28.4 degrees Celsius.

Keywords

Main Subjects

Hydrogeomorphology

Articles in Press, Accepted Manuscript
Available Online from 06 July 2024

Files

History

  • Receive Date: 11 February 2024
  • Revise Date: 03 July 2024
  • Accept Date: 06 July 2024

Share

How to cite

Statistics