Study on Change of Small Area Land Water Reserves Based on GRACE-FO Satellite

Tianhao Fei, Ya Ban, Ling Yu, Xinping Xu

2022

Abstract

In order to monitor the changes of water resources in small regions, taking Chongqing as an example, the temporal and spatial changes of groundwater reserves in the region are studied by using GRACE-FO gravity satellite data, and the data are processed by Gaussian smoothing, and analyzed in combination with precipitation data and terrain. The results show that the land water reserves in Chongqing all show obvious seasonal changes, showing an upward trend of 1.2mm/mon in summer and autumn, and a downward trend of - 0.9mm/mon in winter and spring; From 2002 to 2022, the change of equivalent water height of land water reserves in Chongqing shows an upward trend, with a change trend of 0.8mm/a. There is a negative correlation between land water reserves and precipitation in Chongqing, with a correlation coefficient of -0.76. The northeast mountainous area with high altitude in Chongqing has a high frequency of rainfall, and the monthly precipitation has little difference. The precipitation in other areas is seasonal; The land water reserves in Chongqing are also related to the topography and population density. The water reserves in the mountainous areas in the north and southeast are high, and the water reserves in the densely populated areas in the southwest are low; The retrieved land water reserves of Chongqing are in good agreement with the county spatial distribution data of groundwater resources in 2015. Based on GRACE-FO satellite, the changes of land water reserves in small areas can be better retrieved.

Paper Citation

in Harvard Style

Fei T., Ban Y., Yu L. and Xu X. (2022). Study on Change of Small Area Land Water Reserves Based on GRACE-FO Satellite. In Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE; ISBN 978-989-758-639-2, SciTePress, pages 129-135. DOI: 10.5220/0011946400003536

in Bibtex Style

@conference{iswee22,
author={Tianhao Fei and Ya Ban and Ling Yu and Xinping Xu},
title={Study on Change of Small Area Land Water Reserves Based on GRACE-FO Satellite},
booktitle={Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE},
year={2022},
pages={129-135},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011946400003536},
isbn={978-989-758-639-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE
TI - Study on Change of Small Area Land Water Reserves Based on GRACE-FO Satellite
SN - 978-989-758-639-2
AU - Fei T.
AU - Ban Y.
AU - Yu L.
AU - Xu X.
PY - 2022
SP - 129
EP - 135
DO - 10.5220/0011946400003536
PB - SciTePress