scholarly journals Anthropogenic Markers in Alta Irrigation District Water Supply Wells

2019 ◽  
Author(s):  
B Esser ◽  
A Deinhart
Keyword(s):  
Water Supply ◽  
Irrigation District ◽  
Anthropogenic Markers

Estimating Water Supply Availability on an Irrigation District Basis in Southern Idaho

2004 ◽  
Author(s):  
B. A. King ◽  
R. A. Oborn ◽  
C. S. McIntosh ◽  
J. C. Stark ◽  
S.L. Love
Keyword(s):  
Water Supply ◽  
Irrigation District

SOIL SALINITY STATUS AND ITS RELATION TO SOME OF THE SOIL AND LAND PROPERTIES OF THREE IRRIGATION DISTRICTS IN SOUTHERN ALBERTA

1985 ◽  
Vol 65 (1) ◽  
pp. 187-193 ◽  
Author(s):  
C. CHANG ◽  
G. C. KOZUB ◽  
D. C. MACKAY
Keyword(s):  
Water Supply ◽  
Water Table ◽  
Soil Salinity ◽  
Soil Texture ◽  
Clay Content ◽  
Salinity Level ◽  
Irrigation District ◽  
Irrigation Districts ◽  
Southern Alberta ◽  
Western Block

A detailed soil salinity survey was carried out in three of the 13 irrigation districts in southern Alberta. About 30 quarter-sections in each district were randomly selected for soil sampling. The location, distance from water supply ditches, slope of the land, and depth to till and water table at each site were recorded. Soil texture and electrical conductivity of extracts of soil samples were determined in the laboratory. The extent of the area with a soil salinity level of 4 dS/m or more is 5% of the total surveyed land in the Western Block of the St. Mary River Irrigation District (WSMRID), 6% in the Lethbridge Northern Irrigation District (LNID) and 9% in the Taber Irrigation District (TID). These values are not as high as others have previously estimated. The salinity level of the soil at each site was found to vary with its location and distance from water supply ditches in the WSMRID and LNID, clay content in the 0- to 120-cm depth in the WSMRID and TID, and water table level in the TID. Key words: Soil texture, EC, SAR, pH

scholarly journals Agricultural Water Resources Management Using Maximum Entropy and Entropy-Weight-Based TOPSIS Methods

Entropy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 364 ◽  
Author(s):  
Mo Li ◽  
Hao Sun ◽  
Vijay Singh ◽  
Yan Zhou ◽  
Mingwei Ma
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Water Resources Management ◽  
Water Demand ◽  
Irrigation District ◽  
Agricultural Water ◽  
Entropy Weight ◽  
Resources Management ◽  
Water Resources Carrying Capacity ◽  
Agricultural Water Resources

Allocation and management of agricultural water resources is an emerging concern due to diminishing water supplies and increasing water demands. To achieve economic, social, and environmental goals in a specific irrigation district, decisions should be made subject to the changing water supply and water demand—the two critical random parameters in agricultural water resources management. This paper presents the foundations of a systematic framework for agricultural water resources management, including determination of distribution functions, joint probability of water supply and water demand, optimal allocation of agricultural water resources, and evaluation of various schemes according to agricultural water resources carrying capacity. The maximum entropy method is used to estimate parameters of probability distributions of water supply and demand, which is the basic for the other parts of the framework. The entropy-weight-based TOPSIS method is applied to evaluate agricultural water resources allocation schemes, because it avoids the subjectivity of weight determination and reflects the dynamic changing trend of agricultural water resources carrying capacity. A case study using an irrigation district in Northeast China is used to demonstrate the feasibility and applicability of the framework. It is found that the framework works effectively to balance multiple objectives and provides alternative schemes, considering the combinatorial variety of water supply and water demand, which are conducive to agricultural water resources planning.

Enumeration and Identification of Asbestos Fibres in Water

1974 ◽  
Vol 32 ◽  
pp. 526-527 ◽  
Author(s):  
O. Mudroch ◽  
J. R. Kramer
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Drainage Basin ◽  
Lake Superior ◽  
Research Work ◽  
List Type ◽  
The West ◽  
Asbestos Fibre ◽  
Amphibole Asbestos

Approximately 60,000 tons per day of waste from taconite mining, tailing, are added to the west arm of Lake Superior at Silver Bay. Tailings contain nearly the same amount of quartz and amphibole asbestos, cummingtonite and actinolite in fibrous form. Cummingtonite fibres from 0.01μm in length have been found in the water supply for Minnesota municipalities.The purpose of the research work was to develop a method for asbestos fibre counts and identification in water and apply it for the enumeration of fibres in water samples collected(a) at various stations in Lake Superior at two depth: lm and at the bottom.(b) from various rivers in Lake Superior Drainage Basin.

Bacterial biofilm behavior in water-supply lines of dental units

1992 ◽  
Vol 50 (1) ◽  
pp. 882-883
Author(s):  
B.D. Tall ◽  
K.S. George ◽  
R. T. Gray ◽  
H.N. Williams
Keyword(s):  
Water Supply ◽  
Medical Devices ◽  
Biofilm Formation ◽  
Bacterial Biofilm

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.

The Water Supply of Lake Nicaragua

1901 ◽  
Vol 51 (1306supp) ◽  
pp. 20932-20932
Author(s):  
Angelo Heilprin
Keyword(s):  
Water Supply
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