| Investigation of the correlation between GRACE TWS and soil moisture in Sarakhs catchment |
| Paper ID : 1107-SMPR |
| Authors: |
|
Farideh Sabzehee *1, Vahab Nafisi2, Siavash Iran Pour3, Bramha Dutt Vishwakarma4 1Geomatics Engineering, Faculty of Civil Engineering and Transportation, University of Isfahan, Isfahan, Iran 2Geomatics Engineering, Faculty of Civil Engineering and Transportation, University of Isfahan, Isfahan, Iran. 3Guest Researcher, Institute of Geodesy, University of Stuttgart, Stuttgart, Germany. 4Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, University Road, Bristol, BS8 1SS, UK |
| Abstract: |
| Drought is a gradual phenomenon that may intensify with time. In fact, drought is the result of interactions between natural and human activities and usually appears in the following ways: reduction in water resources, accelerating desertification, the vegetation cover change and etc. Monitoring and prediction of components of drought occurrence are highly valued for improving management of water resources and reducing its associated damages. The GRACE satellite mission provided monthly Earth’s gravity field anomalies where its data can be employed for estimating the changes in Total Water Storage (TWS) content. Here, in this paper, we target to look for the potential correlation between GRACE TWS and the soil moisture (SM) extracted from the hydrological model GLDAS in Sarakhs catchment in north-east of Iran, covering time period 2003-2016. In order to reduce the leakage errors in GRACE measurements, a data-driven approach introduced by Vishwakarma et al. (2017) is used here. We find a time lag of 19 months between GRACE TWS and soil moisture, where both TWS and soil moisture content show negative trend over Sarakhs catchment. Our findings express that in this area, the water resources are in danger and should be monitored and managed with more cautions. |
| Keywords: |
| Soil moisture, GRACE, GLDAS, Total Water Storage, Sarakhs, Drought. |
| Status : Conditional Accept (Poster) |
