@article{fdi:010057194,
  title = {{A}ssessing water availability in a semi-arid watershed of southern {I}ndia using a semi-distributed model},
  author = {{P}errin, {J}. and {F}errant, {S}. and {M}assuel, {S}ylvain and {D}ewandel, {B}. and {M}ar{\'e}chal, {J}. {C}. and {A}ulong, {S}. and {A}hmed, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}ppropriate groundwater resource management becomes a priority for the {S}tates of the semi-arid southern {I}ndia. {B}ecause of the highly increasing groundwater demand, the number of drought-prone regions where the groundwater resource is classified as over-exploited by the {G}overnment is critically increasing. {T}hus there is a need to develop quantitative methodologies adapted to the regional context that are capable to assess water resources at watershed scale and the impact of management measures. {T}his study demonstrates the calibration and use of an integrated water resource assessment model ({SWAT}) in an 84 km(2) representative semi-arid crystalline watershed of southern {I}ndia with no perennial surface water source. {T}he model can reproduce (i) the recharge rate estimates derived independently by a groundwater balance computation, (ii) runoff and surface water storage occurring in tanks that spread along the drainage system, (iii) groundwater table fluctuations monitored at a monthly time step. {R}esults show that even if the calibration period (2006-2010) was more humid than long-term average, the watershed is sensitive to the monsoon inter-annual variability with water-stress during the dry years and an associated loss in agricultural production. {T}he impact of these dry years is spatially variable with higher vulnerability for sub-basins having proportionally larger irrigated paddy areas, lower groundwater resource, and/or lower recharge potential (i.e., due to land use and repartition of percolation tanks). {T}he scope for additional recharge by means of managed aquifer recharge structures is limited and demand-side management measures are needed to mitigate pumping. {A} wishful management objective may be to see groundwater reserves as a supplementary resource in case of monsoon failure and not as the main water resource to be used indiscriminately. {SWAT} proved to be an adequate modeling framework for the simulation of water resource in semi-arid hard-rock context where groundwater vertical fluxes largely prevail over regional lateral flows at km-scale. {I}t provides interesting capabilities for water availability mapping and the simulation of different types of scenarios (e.g., land use changes, climate change).},
  keywords = {{W}ater resource management ; {SWAT} ; {S}emi-arid ; {C}rystalline aquifer ; {I}ndia ; {I}rrigation},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {460},
  numero = {},
  pages = {143--155},
  ISSN = {0022-1694},
  year = {2012},
  DOI = {10.1016/j.jhydrol.2012.07.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057194},
}