Factors affecting groundwater recharge following clearing in the south western Murray Basin

Abstract Data from 18 field studies in the south western Murray Basin (Australia) and a simple water balance model were used to study the importance of factors which affect diffuse recharge in that area. Generally as the texture of the soil became heavier the recharge decreased. Under cropped land as the clay content in the top 2 m of the soil profile increased from 0 to 20%, recharge decreased by one order of magnitude (from about 30 to about 3 mm year−1, for a mean annual rainfall of 310–380 mm). As mean annual rainfall increased the mean annual recharge also increased. Sites with an average clay content of about 10% in the top 2 m and a mean annual rainfall of 270 mm had an estimated recharge of about half that of sites with a mean annual rainfall of 310–380 mm. Data from land which was grazed but not cropped showed similar relationships. However, the data set did not allow a detailed analysis of the effect of land use on recharge.

[1]  N. L. Powell,et al.  COMPARISON OF FIELD- AND LABORATORY‐MEASURED AND PREDICTED HYDRAULIC PROPERTIES OF A SOIL WITH MACROPORES , 1984 .

[2]  M. Hughes,et al.  The use of environmental chloride and tritium to estimate total recharge to an unconfined aquifer , 1978 .

[3]  R. Athavale,et al.  Estimation of recharge to the phreatic aquifers of the Lower Maner Basin, India, by using the titrium injection method , 1980 .

[4]  Daniel Hillel,et al.  Groundwater recharge in arid regions: Review and critique of estimation methods , 1988 .

[5]  Keith H. Northcote,et al.  A factual key for the recognition of Australian soils , 1971 .

[6]  Johan Bouma,et al.  Soil morphology and preferential flow along macropores , 1981 .

[7]  Peter G. Cook,et al.  A helicopter‐borne electromagnetic survey to delineate groundwater recharge rates , 1992 .

[8]  A. Peck.  Salinization of non-irrigated soils and associated streams: a review , 1978 .

[9]  D. Bredenkamp.  Quantitative Estimation of Ground-Water Recharge in Dolomite , 1988 .

[10]  J. Ferreira,et al.  BALSEQ — A Model for the Estimation of Water Balances, Including Aquifer Recharges, Requiring Scarce Hydrologic Data , 1988 .

[11]  P. Cook,et al.  Spatial variability of groundwater recharge in a semiarid region , 1989 .

[12]  Glen R. Walker,et al.  Land clearance and river salinisation in the western Murray Basin, Australia , 1990 .

[13]  Marios Sophocleous,et al.  Groundwater recharge estimation and regionalization: the Great Bend Prairie of central Kansas and its recharge statistics , 1992 .

[14]  P. Cook,et al.  A new chloride leaching approach to the estimation of diffuse recharge following a change in land use , 1991 .

[15]  R. Isbell,et al.  A description of Australian soils. , 1975 .

[16]  P. Lawrence,et al.  EFFECT OF LAND DEVELOPMENT ON GROUNDWATER RECHARGE DETERMINED FROM NON-STEADY CHLORIDE PROFILES , 1991 .

[17]  R. Nulsen,et al.  Water use by some crops and pastures in the southern agricultural areas of Western Australia , 1987 .

[18]  J. R. Mcalpine,et al.  Estimating pasture growth periods and droughts from simple water balance models. , 1970 .

[19]  W. Edmunds,et al.  A record of climatic and environmental change contained in interstitial waters from the unsaturated zone of northern Senegal , 1992 .

[20]  I. Simmers.  Estimation of natural groundwater recharge , 1988 .