TITLE:
On the Application of Probabilistic Hydrometeorological Simulation of Soil Moisture across Different Stations in India
AUTHORS:
Sarit Kumar Das, Rajib Maity
KEYWORDS:
Soil Moisture, Probabilistic Modelling, Copula, Hydrometeorology, Hydroclimatology
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.2 No.3,
June
13,
2014
ABSTRACT: An application of a proposed
hydrometeorological approach for probabilistic simulation of soil moisture is
carried out. The time series of in-situ soil moisture and meteorological
variables at monthly scale from a few monitoring stations having different
soil-hydrologic properties across India are utilized. Preliminary investigation
with both precipitation and near-surface air-tempera- ture as meteorological
variables to establish that the strength of association between soil moisture
and precipitation is more significant as compared to that between soil moisture
and temperature. Precipitation-based probabilistic estimation of soil moisture
using the proposed hydrometeorological approach is tested with in-situ observed
soil moisture, CPC model output and with soil moisture data of the Climate
Change Initiative (CCI) project. The parameter of the developed model is linked
to the soil-hydrologic characteristics through Hydrologic Soil Group (HSG)
classification. Higher values of model parameter (dependence parameter (θ) for
the selected copula) correspond to HSG A and B having higher soil porosity,
whereas, lower values correspond to HSG B and C having lower soil porosity.