Submitted manuscript, 524 KB, PDF document
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Quantifying the differential contributions of deep groundwater to streamflow in nested basins, using both water quality characteristics and water balance
AU - Ockenden, Mary
AU - Chappell, Nick
AU - Neal, Colin
PY - 2014/4
Y1 - 2014/4
N2 - This paper describes use of a hydro-chemical mixing model and a water budget to investigate the presence of deep runoff pathways in two small, nested sub-catchments of the Eden basin, UK (8.8 km2 Blind Beck and 1.0 km2 Low Hall stream). A linear relationship between bicarbonate concentration and electrical conductivity was used in a two-component mixing model. End-members were identified as a high-solute, deep groundwater and a low-solute, soil-water. The mixing model indicated 69% ±10% deep groundwater in Low Hall for September–December 2008 and 46% ±8% in Blind Beck for the same period. The water budget also indicated more deep groundwater in Low Hall stream. These results were consistent with the findings of rainfall–runoff models which also indicated the presence of high storage, deeper pathways.
AB - This paper describes use of a hydro-chemical mixing model and a water budget to investigate the presence of deep runoff pathways in two small, nested sub-catchments of the Eden basin, UK (8.8 km2 Blind Beck and 1.0 km2 Low Hall stream). A linear relationship between bicarbonate concentration and electrical conductivity was used in a two-component mixing model. End-members were identified as a high-solute, deep groundwater and a low-solute, soil-water. The mixing model indicated 69% ±10% deep groundwater in Low Hall for September–December 2008 and 46% ±8% in Blind Beck for the same period. The water budget also indicated more deep groundwater in Low Hall stream. These results were consistent with the findings of rainfall–runoff models which also indicated the presence of high storage, deeper pathways.
KW - bicarbonate
KW - Eden catchment
KW - electrical conductivity
KW - end-member mixing
KW - hydrological pathway
KW - interbasin groundwater flow
U2 - 10.2166/nh.2013.035
DO - 10.2166/nh.2013.035
M3 - Journal article
VL - 45
SP - 200
EP - 212
JO - Hydrology Research
JF - Hydrology Research
SN - 0029-1277
IS - 2
ER -