נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Groundwater recharge through verti sols: Irrigated cropland vs. natural land, Israel
Year:
2011
Source of publication :
Vadose Zone Journal
Authors :
Kurtzman, Daniel
;
.
Volume :
10
Co-Authors:
Kurtzman, D., Insti tute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Scanlon, B.R., Bureau of Economic Geology, Jackson School of Geosciences, Univ. of Texas at Austin, 10100 Burnet Rd., Austin, TX 78758, United States
Facilitators :
From page:
662
To page:
674
(
Total pages:
13
)
Abstract:
Land use change from natural ecosystems to cropland influences groundwater recharge, including water quanti ty and quality. Soil core samples (0-11-m depth) from six boreholes beneath irrigated cropland and two boreholes beneath natural ecosystems, in Verti sols, were analyzed for parti cle size distribution, water content, and water-extractable Cl -.Chloride mass balance and numerical, one-dimensional unsaturated flow and transport modeling were used to assess average and transient recharge fluxes and to test matrix vs. preferential flow hypotheses. Water contents under irrigated cropland were significantly higher than under natural land with similar parti cle size distributions. Pore-water Cl - concentrate ons in deep vadose zones (>3 m) under irrigated cropland (900-2000 mg L -11) were similar to recent local groundwater Cl - and significantly lower than pore-water Cl - in deep vadose zones under natural land (3000-6000 mg L -11). Calibrated models' recharge rates through the soil matrix were much higher under irrigated cropland (90-230 mm yr -11) than natural ecosystems (1-3 mm yr -11) and were consistent with groundwater-balance esti -mates of average recharge (110-160 mm yr -11). In contrast, matrix recharge rates under natural ecosystems were considerably lower than those based groundwater balance (50-80 mm yr -11). While matrix unsaturated flow under irrigated cropland explains vadose zone and groundwater observations, under natural ecosystems preferential flow paths are required to support observations. Plowing and irrigation prevent development of crack networks and promote matrix percolation through the clay, which flushes salts from previously immobile vadose zone pore water. These phenomena may be applicable to similar land use changes in Verti sols globally. © Soil Science Society of America 5585 Guilford Rd., Madison, WI 53711 USA. All rights reserved.
Note:
Related Files :
ecosystems
Ground water recharge
hydrogeology
Israel
Natural ecosystem
size distribution
vadose zone
Show More
Related Content
More details
DOI :
10.2136/vzj2010.0109
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29367
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
Scientific Publication
Groundwater recharge through verti sols: Irrigated cropland vs. natural land, Israel
10
Kurtzman, D., Insti tute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Scanlon, B.R., Bureau of Economic Geology, Jackson School of Geosciences, Univ. of Texas at Austin, 10100 Burnet Rd., Austin, TX 78758, United States
Groundwater recharge through verti sols: Irrigated cropland vs. natural land, Israel
Land use change from natural ecosystems to cropland influences groundwater recharge, including water quanti ty and quality. Soil core samples (0-11-m depth) from six boreholes beneath irrigated cropland and two boreholes beneath natural ecosystems, in Verti sols, were analyzed for parti cle size distribution, water content, and water-extractable Cl -.Chloride mass balance and numerical, one-dimensional unsaturated flow and transport modeling were used to assess average and transient recharge fluxes and to test matrix vs. preferential flow hypotheses. Water contents under irrigated cropland were significantly higher than under natural land with similar parti cle size distributions. Pore-water Cl - concentrate ons in deep vadose zones (>3 m) under irrigated cropland (900-2000 mg L -11) were similar to recent local groundwater Cl - and significantly lower than pore-water Cl - in deep vadose zones under natural land (3000-6000 mg L -11). Calibrated models' recharge rates through the soil matrix were much higher under irrigated cropland (90-230 mm yr -11) than natural ecosystems (1-3 mm yr -11) and were consistent with groundwater-balance esti -mates of average recharge (110-160 mm yr -11). In contrast, matrix recharge rates under natural ecosystems were considerably lower than those based groundwater balance (50-80 mm yr -11). While matrix unsaturated flow under irrigated cropland explains vadose zone and groundwater observations, under natural ecosystems preferential flow paths are required to support observations. Plowing and irrigation prevent development of crack networks and promote matrix percolation through the clay, which flushes salts from previously immobile vadose zone pore water. These phenomena may be applicable to similar land use changes in Verti sols globally. © Soil Science Society of America 5585 Guilford Rd., Madison, WI 53711 USA. All rights reserved.
Scientific Publication
You may also be interested in