Using Weighing Lysimeters to Develop Evapotranspiration Crop Coefficients
Weighing lysimeters provide an accurate means of measuring evapotranspiration (ET), the evaporative loss of water from growing crops. Two weighing lysimeters were installed at a research...

Arid Site Water Balance Using Monolith Lysimeters
Four weighing lysimeters, containing monoliths of undisturbed soil, are located at the Arid Lands Ecology Reserve near Richland, Washington (USA), and are used to measure the water balance...

Alfalfa ET Measurements with Drainage Lysimeters
Drainage lysimeters were used to measure alfalfa evapotranspiration (ET) under a line-gradient sprinkler system in the high-elevation desert conditions of northwest New Mexico. The lysimeters...

Lysimeters: Data Acquisition and Analysis
Lysimeters provide the most direct method for measuring evapotranspiration (ET). For ten years we have used weighing lysimeters capable of a resolution equivalent to 0.02 mm of water....

Use of Lysimeters to Monitor a Sanitary Landfill
A vadose zone monitoring program has been developed using basin lysimeters to evaluate the environmental impacts of a sanitary waste landfill. Lysimeter systems, consisting of collection...

Surface-Drained Level Basins for Rice Production
Surface-drained level-basin systems, consisting of a series of terraced level basins in which a portion of the applied water is drained from the inlet end of the basin, can be used to...

Interaction of Irrigation Water and Drainage Flow
This study was conducted to evaluate the effect of irrigation management on subsurface drainage flow in an arid irrigated area. The irrigation management and drainage flow were monitored...

Efficient Water Use in Irrigated Wheat
Border irrigated wheat is the main crop in arid, semiarid and winter-dry areas in Mexico. In general water use efficiency is low, since border irrigation systems are not well designed...

Surface Water/Groundwater Interaction Studies
Studies were performed on a high elevation (2440 meters or 8000 feet) valley stream system and a high (1980 meters or 6500 feet) cold desert stream system in Wyoming, to analyze the surface...

The Ala Wai Canal—From Wetlands to World-Famous Waikiki
The Ala Wai Canal, a man-made tidal estuary on the island of Oahu, Hawaii, is located about a half mile (0.8 km) landward of Waikiki beach and is two miles (3.2 km) long. As Hawaii's...

Improved HSPF Infiltration Calibration Procedure with a Linked GIS
A research project for the Florida Institute of Phosphate Research sought to develop an easy-to-apply integrated surface drainage model, HSPF, and groundwater model, MODFLOW, with a geographic...

Well and Formation Losses
For design projects in the groundwater area, a step-drawdown test is commonly used to investigate the properties of the well-aquifer systems. Higher well and formation losses are usually...

G.I.S. Applications in Nonpoint Source Pollution Assessment
A Geographic Information System (GIS) provides a flexible tool for developing the oftentimes cumbersome soils and land use mapping database required in watershed storm water management...

Landfill Park: From Eyesore to Asset
By reclaiming a 50 acre landfill as a recreational area, Cambridge, Mass. increased its open space by 20%. The park includes three softball and three soccer fields, one multisport field,...

The Carson and Truckee Rivers Lifeline in the Desert
Nevada is the most arid state in the nation with an average annual precipitation of less than 9 inches (23 cm) over the 110,500 square miles (286,200 sq km). The Truckee, Carson, and Walker...

The Keppel Marina—Developing and Operating a High-Intensity Marina in Singapore
The Keppel Marina in Singapore represents a highly-efficient, high intensity use of a small land and water site area for a stack storage marina and boatyard, developed and operating within...

Planning and Designing the Land and Water Human Environments in Marinas
Historically, the planning and design of marinas placed the greatest emphasis on solutions which served the inanimate objects comprising marinas-boats, docks, buildings, automobiles and...

Tactical Aircraft and Airfield Recovery
This article is based on Captain Bahm's Master's thesis and was co-authored by his thesis advisor, Captain Polasek. The article is reprinted from the Airpower...

Landing on Frictionless Surfaces
Who in his right mind would deliberately land an airplane on a frictionless surface? Unfortunately, professional pilots occasionally encounter situations where the friction between rubber...

ACN-PCN Concepts for Airport Pavement Management
The aircraft classification number-pavement classification number (ACN-PCN) method is the standardized International Civil Aviation Organization (ICAO) method for reporting airport pavement...

 

 

 

 

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