Coordinating water resources in the federal system : the groundwater-surface water connection.

Mode of access: Internet.

Surface water supply of Virginia,

Mode of access: Internet.

Surface water temperature and density: Atlantic coast, North and South America. 3d ed.

Previous editions published under title: Surface water temperature and salinity, Atlantic coast, North and South America.

Report of Sacramento-San Joaquin water supervision for ... /

Mode of access: Internet.

Surface water resources of Pierce County /

"Lake and stream classification project."

A Review of surface-water sediment fractions and their interactions with presistent manmade organic compounds /

Mode of access: Internet.

Summary of selected computer programs produced by the U.S. Geological Survey for simulation of ground-water flow and quality, 1994 /

Mode of access: Internet.

Ground-water flow and simulated effects of development in Stagecoach Valley, a small, partly drained basin in Lyon and Storey counties, western Nevada /

Mode of access: Internet.

Drainage-return, surface-water withdrawal, and land-use data for the Sacramento-San Joaquin Delta, with emphasis on Twitchell Island, California /

Mode of access: Internet.

Shallow ground-water flow and drainage characteristics of the Brown Ditch basin near the East Unit, Indiana Dunes National Lakeshore, Indiana, 1982 /

Mode of access: Internet.

Surface Water Supply of New Mexico

1911-June 1914, 1930-1931 issued with the cooperation of the U.S. Geological Survey

Pesticides and volatile organic compounds in ground and surface water of the Palouse subunit, Washington and Idaho.

Mode of access: Internet.

Estimating percolation and lateral water flow on sloping land in rainfed lowland rice ecosystem

Quantifying water losses in paddy fields assists estimation of water availability in rainfed lowland rice ecosystem. Little information is available on water balance in different toposequence positions of sloped rainfed lowland. Therefore, the aim of this work was to quantify percolation and the lateral water flow with special reference to the toposequential variation. Data used for the analysis was collected in Laos and northeast Thailand. Percolation and water tables were measured on a daily basis using a steel cylindrical tube with a lid and perforated PVC tubes, respectively. Percolation rate was determined using linear regression analysis of cumulative percolation. Assuming that the total amount of evaporation and transpiration was equivalent to potential evapotranspiration, the lateral water flow was estimated using the water balance equation. Separate perched water and groundwater tables were observed in paddy fields on coarse-textured soils. The percolation rate varied between 0 and 3 mm/day across locations, and the maximum water loss by lateral movement was more than 20 mm/day. Our results are in agreement with the previously reported findings, and the methodology of estimating water balance components appears reasonably acceptable. With regard to the toposequential variation, the higher the position in the topoesquence, the greater potential for water loss because of higher percolation and lateral flow rates.

Experimental investigation and CFD simulation of insulation debris transport phenomena in water flow

The investigation of insulation debris generation, transport and sedimentation becomes important with regard to reactor safety research for PWR and BWR, when considering the long-term behavior of emergency core cooling systems during all types of loss of coolant accidents (LOCA). The insulation debris released near the break during a LOCA incident consists of a mixture of disparate particle population that varies with size, shape, consistency and other properties. Some fractions of the released insulation debris can be transported into the reactor sump, where it may perturb/impinge on the emergency core cooling systems. Open questions of generic interest are the sedimentation of the insulation debris in a water pool, its possible re-suspension and transport in the sump water flow and the particle load on strainers and corresponding pressure drop. A joint research project on such questions is being performed in cooperation between the University of Applied Sciences Zittau/Görlitz and the Forschungszentrum Dresden-Rossendorf. The project deals with the experimental investigation of particle transport phenomena in coolant flow and the development of CFD models for its description. While the experiments are performed at the University at Zittau/Görlitz, the theoretical modeling efforts are concentrated at Forschungszentrum Dresden-Rossendorf. In the presentation the basic concepts for CFD modeling are described and feasibility studies including the conceptual design of the experiments are presented.