TY  - JOUR
ID  - SisLab4815
UR  - https://www.tandfonline.com/journals/tejr20
IS  - 0
A1  - Ha, Minh-Cuong
A1  - Darrozes, José
A1  - Llubes, Muriel
A1  - Grippa, Manuela
A1  - Ramillien, Guillaume
A1  - Frappart, Frédéric
A1  - Baup, Frédéric
A1  - Tagesson, Hĺkan Torbern
A1  - Mougin, Eric
A1  - Guiro, Idrissa
A1  - Kergoat, Laurent
A1  - Nguyen, Huu Duy
A1  - Seoane, Lucia
A1  - Dufrechou, Gregory
A1  - Vu, Phuong-Lan
Y1  - 2022/12/27/
N2  - With population growth, water will increase in the following decades tremendously. The optimization of water allocation for agriculture requires accurate soil moisture (SM) monitoring. Recent Global Navigation Satellite System Reflectometry (GNSS-R) studies take advantage of continuously emitted navigation signals by the Global Navigation Satellite System (GNSS) constellations to retrieve spatiotemporal soil moisture changes for soil with high clay content. It presents the advantage of sensing a whole surface around a reference GNSS antenna. This article focuses on sandy SM monitoring in the driest condition observed in the study field of Dahra, (Senegal). The area consists of 95% sand and in situ volumetric soil moisture (VSM) range from ~3% to ~5% durinf the dry to the rainy season. Unfortunately, the GNSS signals? waves penetrated deep into the soil during the dry period and strongly reduced the accuracy of GNSS reflectometry (GNSS-R) surface moisture measurements. However, we obtain VSM estimate at low/medium penetration depth. The correlation reaches 0.9 with VSM error lower than 0.16% for the 5?10-cm-depth probes and achieves excellent temporal monitoring to benefit from the antenna heights directly correlated to spatial resolution. The SM measurement models in our research are potentially valuable tools that contribute to the planning of sustainable agriculture, especially in countries often affected by drought.
PB  - Taylor & Francis
JF  - European Journal of Remote Sensing
VL  - 0
SN  - 11298596
TI  - GNSS-R monitoring of soil moisture dynamics in areas of severe drought: example of Dahra in the Sahelian climatic zone (Senegal)
SP  - 1
AV  - public
EP  - 19
ER  -