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Articles 751 - 780 of 851
Full-Text Articles in Physical Sciences and Mathematics
Preliminary Groundwater And Salinity Investigations In The Eastern Wheatbelt 2. Merredin Catchment, Richard J. George Dr, P W C Frantom
Preliminary Groundwater And Salinity Investigations In The Eastern Wheatbelt 2. Merredin Catchment, Richard J. George Dr, P W C Frantom
Resource management technical reports
Saline groundwater occurs within twelve metres of the surface throughout the valley of the Merredin catchment. Saline groundwater occurs within deep sediments deposited in the valley and deeply-weathered bedrock materials. Rapid groundwater recharge appears to be taking place in sandy-textured soils high in the landscape and directly into the Cainozoic sediments in the valley floor. Water-tables are rising at approximately ten centimetres each year in the upper catchment area.
Saturated Thickness Of The Principal Groundwater Reservoir In Nebraska, Conservation And Survey Division
Saturated Thickness Of The Principal Groundwater Reservoir In Nebraska, Conservation And Survey Division
Conservation and Survey Division
No abstract provided.
Groundwater Levels In Nebraska, 1987, Michael J. Ellis, Perry B. Wigley
Groundwater Levels In Nebraska, 1987, Michael J. Ellis, Perry B. Wigley
Conservation and Survey Division
No abstract provided.
Preliminary Groundwater And Salinity Investigations In The Eastern Wheatbelt. 3. Welbungin And Beacon River Catchments, Richard J. George Dr, P W C Frantom
Preliminary Groundwater And Salinity Investigations In The Eastern Wheatbelt. 3. Welbungin And Beacon River Catchments, Richard J. George Dr, P W C Frantom
Resource management technical reports
Water-tables show no obvious signs of a nett annual rise in the bores monitored in the valley floor, lower slope areas over the three year period. Groundwaters are extremely saline, the sedimentary and saprolite aquifers permeable (hydraulic conductivity range 0.1-2.0 m/day) (0.0001). Future management systems should seek to decrease recharge by changing rotations and farm practises while increasing discharge by using trees, pumps and halophytes. Options are available for drainage.
International Law And The Environment, Daniel Barstow Magraw
International Law And The Environment, Daniel Barstow Magraw
Proceedings of the Sino-American Conference on Environmental Law (August 16)
18 pages.
Contains 3 pages of references.
Movement And Transformation Of Selected Organic Pollutants In Subsurface Environmet In Arkansas, Ali U. Shaikh
Movement And Transformation Of Selected Organic Pollutants In Subsurface Environmet In Arkansas, Ali U. Shaikh
Technical Reports
Several subsurface soil and groundwater samples from eastern, southern and central Arkansas were analyzed for chlorinated organic compounds commonly used as pesticides and industrial chemicals. No significant amount of these compounds were found in these samples. The adsorption/partition characteristics of some of these compounds, such as dichlorophenols, aldrin and endrin, were determined in siltloam, sandyloam and clay soils collected from the above geographical locations. Results indicate that there is considerable difference in retention capability of different types of soils with respect to different pollutants. The partition coefficient of a particular compound in a certain type of soil can be related …
Abatement Of Nitrate Pollution In Groundwater And Surface Runoff From Cropland Using Legume Cover Crops With No-Till Corn, M. Scott Smith, Jac J. Varco
Abatement Of Nitrate Pollution In Groundwater And Surface Runoff From Cropland Using Legume Cover Crops With No-Till Corn, M. Scott Smith, Jac J. Varco
KWRRI Research Reports
Agricultural practices can have a significant impact on water quality. The effects of leguminous winter cover crops on leaching of NO-3; from soil have been investigated in this project. Legume cover crops, by fixation of atmospheric N, can reduce the amount of fertilizer N required to produce summer grain crops. The methods initially used to evaluate cover crop effects on No; transport included suction probe lysimeters and measurement of NO-3; in soil samples collected to a depth of 90 cm. These measurements demonstrated extreme spatial variability in NO-3; distribution and water …
Keep The Farmer Farming—How To Eat Your Water Cake And Have It Too, Raphael J. Moses
Keep The Farmer Farming—How To Eat Your Water Cake And Have It Too, Raphael J. Moses
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
14 pages.
Contains references.
Toward Optimal Utilization Of Water Resources: The “Physical Solution", Harrison C. Dunning
Toward Optimal Utilization Of Water Resources: The “Physical Solution", Harrison C. Dunning
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
18 pages.
Policies To Enhance Western Water Use Efficiency: Best Of The West, Bruce C. Driver
Policies To Enhance Western Water Use Efficiency: Best Of The West, Bruce C. Driver
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
18 pages.
Facilitating Voluntary Water Transfers In California, James T. Markle
Facilitating Voluntary Water Transfers In California, James T. Markle
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
28 pages.
Contains references.
Changing Patterns Of Water Use In The West: Pressures On The System, David H. Getches
Changing Patterns Of Water Use In The West: Pressures On The System, David H. Getches
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
17 pages.
Potential Improvements In Irrigation Management Practices: Water Savings And Costs, James R. Gilley
Potential Improvements In Irrigation Management Practices: Water Savings And Costs, James R. Gilley
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
26 pages.
Augmenting Municipal Water Supplies Through Agricultural Water Conservation, David Engels
Augmenting Municipal Water Supplies Through Agricultural Water Conservation, David Engels
Western Water: Expanding Uses/Finite Supplies (Summer Conference, June 2-4)
38 pages (includes maps).
Policy Issue Study On Integrated Management Of Surface Water And Groundwater Report, Dayle E. Williamson, Bob Kuzelka
Policy Issue Study On Integrated Management Of Surface Water And Groundwater Report, Dayle E. Williamson, Bob Kuzelka
Conservation and Survey Division
No abstract provided.
Jandakot Groundwater Scheme Area : A Study Of Land Resources And Planning Considerations, M R. Wells, N L B Richards, A J. Clarke
Jandakot Groundwater Scheme Area : A Study Of Land Resources And Planning Considerations, M R. Wells, N L B Richards, A J. Clarke
Resource management technical reports
No abstract provided.
Proceedings Of The First Arkansas Water Conference, Randy Young, Alice T. Gamache
Proceedings Of The First Arkansas Water Conference, Randy Young, Alice T. Gamache
Technical Reports
The purpose of this conference is to: Discuss Arkansas water problems and opportunities for addressing those problems. In the water resources management arena, Arkansas is truly the "Land of Opportunity" as our motto states. Serve as a public forum to stimulate thought and interest in Arkansas' water resources.
Interstate Transfers Of Water: Opportunities And Obstables [Sic], A. Dan Tarlock
Interstate Transfers Of Water: Opportunities And Obstables [Sic], A. Dan Tarlock
Western Water Law in Transition (Summer Conference, June 3-5)
34 pages.
Administering Water Rights: The Permit System, Lawrence J. Wolfe
Administering Water Rights: The Permit System, Lawrence J. Wolfe
Western Water Law in Transition (Summer Conference, June 3-5)
69 pages.
Contains references.
The Prior Appropriation System In Western Water Law: The Law Viewed Through The Example Of The Rio Grande Basin, James N. Corbridge Jr., Charles F. Wilkinson
The Prior Appropriation System In Western Water Law: The Law Viewed Through The Example Of The Rio Grande Basin, James N. Corbridge Jr., Charles F. Wilkinson
Western Water Law in Transition (Summer Conference, June 3-5)
17 pages.
Contains references.
Administering Water Rights: The Colorado System, Raymond L. Petros
Administering Water Rights: The Colorado System, Raymond L. Petros
Western Water Law in Transition (Summer Conference, June 3-5)
140 pages (includes illustrations and maps).
Contains bibliography.
Groundwater Levels In Nebraska, 1984, Michael J. Ellis, Darryll T. Pederson
Groundwater Levels In Nebraska, 1984, Michael J. Ellis, Darryll T. Pederson
Conservation and Survey Division
No abstract provided.
Northern Wheatbelt Water Supply Study, I A F Laing, R. M. Pridham
Northern Wheatbelt Water Supply Study, I A F Laing, R. M. Pridham
Journal of the Department of Agriculture, Western Australia, Series 4
Department of Agriculture surveys have shown that many farms in Western australia's northern wheatbelt have inadequate water supplies. More than 80 per cent of all farms in that area depend soley on groundwater for watering livestock, a much higher percentage than for most other farming areas. Because groundwater salinities have increased in recent years, concern is held for the long-term future of this recource.
In contrast to more southern agricultural areas, farm dams in the northern wheatbelt are relatively uncommon. Only 30 per cent of the existing dams in the northern wheatbelt constitute effective water supplies. More than half of …
Increasing Groundwater Salinity In The Northern Wheatbelt, R J. Mcgowan
Increasing Groundwater Salinity In The Northern Wheatbelt, R J. Mcgowan
Journal of the Department of Agriculture, Western Australia, Series 4
Every farmer in western Australia's northern wheatbelt will know of a groundwater supply, be it bore, well or soak. that has become increasingly saline. The groundwater may have become more saline over a period of 15 years or more, or have been noticed only recently. Inevitably, the bore will lie within an area cleared for agriculture. This increase in groundwater salinity may be associated with soil salinisation. Although researchers have some understanding of the processes causing salinisation of groundwater in the wheatbelt and the extent of the problem, little is known about the rates of salinisation and groundwater rise. A …
Underground Water Supplies In The Wheatbelt, T T. Bestow
Underground Water Supplies In The Wheatbelt, T T. Bestow
Journal of the Department of Agriculture, Western Australia, Series 4
Underground water originates from rainfall. The size of the underground recource in any region is broadly related to the amount of rainfall. However, rainfall intensity and seasonal distribution are just as importent as the quality. A relatively small annual fall which consists of a series of heasvy showers or storms close together, may be a more effective source of recharge to underground water than a larger fall that is more evenly distributed over a longer period.
A large annual rainfall, however, is no guarantee that underground water supplies will be readily available. This is because soils and the underlying rocks …
Atlas Illustrating The Characteristics Of Groundwater In Nebraska, Vince Dreeszen
Atlas Illustrating The Characteristics Of Groundwater In Nebraska, Vince Dreeszen
Conservation and Survey Division
No abstract provided.
Groundwater Quality And Mineral Deposits Relationships In The Ozark Mountains, Kenneth F. Steele
Groundwater Quality And Mineral Deposits Relationships In The Ozark Mountains, Kenneth F. Steele
Technical Reports
Ninety-nine groundwater sites were sampled in northern Arkansas in order to determine the effect of local manganese, phosphate, pyrite, lead-zinc and uranium mineralization on the groundwater chemistry. Most of this study (75 springs) was concentrated in the Batesville manganese district. Hydrogeochemical exploration for these types of manganese deposits appears possible with 44 percent of the springs within 2000 feet of mineralization having anomalous metal concentrations (especially manganese). Because only a few springs were sampled in the remaining areas, the results are not conclusive; however, only the pyrite and small lead-zinc deposit would appear worthy of additional investigation. None of the …
The Case For A Legislative Solution To Indian Water Claims, James M. Bush
The Case For A Legislative Solution To Indian Water Claims, James M. Bush
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
57 pages.
Investigations And Research In Nevada By The Water Resources Division, U. S. Geological Survey, 1982-83, Terry Katzer, Otto Moosburner, William D. Nichols
Investigations And Research In Nevada By The Water Resources Division, U. S. Geological Survey, 1982-83, Terry Katzer, Otto Moosburner, William D. Nichols
Publications (WR)
The Water Resources Division, U.S. Geological Survey, is charged with (1) maintaining a hydrologic network in Nevada that provides information on the status of the State's water resources and (2) engaging in technical water-resources investigations that have a high degree of transferability. To meet these broad objections, 26 projects were active in Nevada during fiscal year 1982 in cooperation with 36 Federal, State, and local agencies. Total funds were $3,319,455, of which State and local cooperative funding amounted to $741,500 and Federal funding (comprised of Geological Survey Federal and cooperative programs plus funds from six other Federal agencies) amounted to …
Hydrological Studies In Soil Salinity, C J. Henschke
Hydrological Studies In Soil Salinity, C J. Henschke
Resource management technical reports
Investigations involved examination of near-surface indurated layers to investigate their role in saltland formation. It was found that groundwater could move readily through this layer due to the presence of macro-pores. Close examination of apparently impermeable pallid zone clays, shows that decayed tree roots and large diameter voids provide a continuous pathway for the veritical transport of saline water from deeper aquifers.