Title: | Satellite soil moisture validation using hydrological SWAT model: A case study of Puerto Rico, USA |
Authors: | Nilawar, A.P., C.P. Calderella, T.Y. Lakhankar, M.L. Waikar and J. Munoz |
Year: | 2017 |
Journal: | Hydrology |
Volume (Issue): | 4(4) |
Pages: | |
Article ID: | 45 |
DOI: | 10.3390/hydrology4040045 |
URL (non-DOI journals): | |
Model: | SWAT |
Broad Application Category: | hydrologic only |
Primary Application Category: | groundwater and/or soil water impacts/processes |
Secondary Application Category: | hydrologic assessment |
Watershed Description: | 310.53 km^2 Rio Gunajibo and 252.52 km^2 Rio Grande de Anasco, located in the western part of the main island of Puerto Rico, U.S. |
Calibration Summary: | |
Validation Summary: | |
General Comments: | |
Abstract: | Soil moisture is placed at the interface between land and atmosphere which influences water
and energy flux. However, soil moisture information has a significant importance in hydrological
modelling and environmental processes. Recent advances in acquiring soil moisture from the
satellite and its effective utilization provide an alternative to the conventional soil moisture methods.
In this study, an attempt is made to apply physically based, distributed-parameter, Soil andWater
Assessment Tool (SWAT) to validate Advanced Microwave Scanning Radiometer (AMSR2) soil
moisture in parts of Puerto Rico. For this, calibration is performed for the years 2010 to 2012
with known observed discharge sites, Rio Gunajibo and Rio Grande de Anasco in Puerto Rico and
validation, with the observed stream flow for the year 2013 using the AMSR2 soil moisture. Moreover,
the SWAT and AMSR2 soil moisture outcome are compared on a monthly basis. The model capability
and performance in simulating the stream flow are evaluated utilizing the statistical method. The
results indicated a negligible difference in SWAT soil moisture and AMSR2 soil moisture for stream
flow estimation. Finally, the model retrievals show a satisfactory agreement between observed and
simulated streamflow. |
Language: | English |
Keywords: | streamflow; watershed; SWAT; AMSR2; SUFI-2; validation |