@article{fdi:010073060,
  title = {{M}apping groundwater reserves in northwestern {C}ambodia with the combined use of data from lithologs and time-domain-electromagnetic and magnetic-resonance soundings},
  author = {{V}alois, {R}. and {V}ouillamoz, {J}ean-{M}ichel and {L}un, {S}. and {A}rnout, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}ack of access to water is the primary constraint to development in rural areas of northwestern {C}ambodia. {C}ommunities lack water for both domestic and irrigation purposes. {T}o provide access to drinking water, governmental and aid agencies have focused on drilling shallow boreholes but they have not had a clear understanding of groundwater potential. {T}he goal of this study has been to improve hydrogeological knowledge of two districts in {O}ddar {M}eanchey {P}rovince by analyzing borehole lithologs and geophysical data sets. {T}he comparison of 55 time-domain electromagnetic ({TEM}) soundings and lithologs, as well as 66 magnetic-resonance soundings ({MRS}) with {TEM} soundings, allows a better understanding of the links between geology, electrical resistivity and hydrogeological parameters such as the specific yield ({S} (y)) derived from {MRS}. {T}he main findings are that water inflow and {S} (y) are more related to electrical resistivity and elevation than to the litholog description. {I}ndeed, conductive media are associated with a null value of {S} (y), whereas resistive rocks at low elevation are always linked to strictly positive {S} (y). {A} new methodology was developed to create maps of groundwater reserves based on 612 {TEM} soundings and the observed relationship between resistivity and {S} (y). {TEM} soundings were inverted using a quasi-3{D} modeling approach called 'spatially constrained inversion'. {S}uch maps will, no doubt, be very useful for borehole siting and in the economic development of the province because they clearly distinguish areas of high groundwater-reserves potential from areas that lack reserves.},
  keywords = {{C}ambodia ; {G}eophysical methods ; {R}esistivity ; {M}agnetic resonance sounding ; {G}roundwater exploration ; {CAMBODGE}},
  booktitle = {},
  journal = {{H}ydrogeology {J}ournal},
  volume = {26},
  numero = {4},
  pages = {1187--1200},
  ISSN = {1431-2174},
  year = {2018},
  DOI = {10.1007/s10040-018-1726-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073060},
}