Water facts and figures for planners and managers

Feth, J. H.

doi:10.3133/cir601i

Cited by 11 publications

(4 citation statements)

References 8 publications

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“…In addition, the following measurements are also included in the report: An explantation of these measurements is given in Hem (1970); American Public Health Association and others (1971); Iwatsubo, Britton, and Averett (1972);and Feth (1973). The analytical techniques are given in Brown, Skougstad, and Fishman (1970).…”

Section: Results Of Surveymentioning

confidence: 99%

Limnological data from selected lakes in the San Francisco Bay region, California

Britton¹,

Ferreira²,

Averett³

1974

Open-File Report

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Section: Results Of Surveymentioning

confidence: 99%

Limnological data from selected lakes in the San Francisco Bay region, California

Britton¹,

Ferreira²,

Averett³

1974

Open-File Report

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“…Only 0.5% of the world's total water supply is available to human as a freshwater (97% is saline water in the ocean and 2.5% is frozen as ice caps and glaciers) and 98% of the available freshwater is groundwater (Feth, 1973). Groundwater can be contaminated by many causes and contamination by organic products, which are often associated with petroleum hydrocarbons or halogenated compounds used as industrial solvents, poses one of major problems.…”

Section: Introductionmentioning

confidence: 99%

Effects of water table fluctuation on diesel fuel migration in one-dimensional laboratory study

Yimsiri

Eua-Apiwatch

Flores

et al. 2016

European Journal of Environmental and Civil Engineering

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The effects of water table fluctuation on diesel fuel redistribution in unsaturated soil are investigated in the laboratory by one-dimensional column test. The simplified image analysis method is used to assess the saturation distributions of water and diesel in the flow domain under transient condition. The experiments are undertaken on two homogeneous sands to study the effects of different particle sizes. The two-phase experimental data illustrate soil-liquid characteristic curves (SLCCs) of water/air and diesel/air systems. The SLCCs of diesel/water systems can be predicted by scaling procedure. A descending order of matric suction at a given saturation of wetting phase is in the order of air/water, diesel/water and air/diesel systems. Coarser particle size gives smaller entry pressure, residual matric suction and residual degree of saturation. The three-phase (air/water/diesel) experimental data illustrate that, during imbibition stages, air and diesel are entrapped below water table with the entrapped air saturations of 18-24% and entrapped diesel saturations of 6-10% for fine sand. Coarser particle size yields smaller entrapped diesel saturations and larger entrapped air saturations. The residual diesel saturations during drainage stages and entrapped diesel saturations during imbibition stages do not show any systematic difference as these stages are repeated. During imbibition stages, 37-47% of the total amount of diesel fuel is entrapped under the water table. Also, there is no systematic difference in the amount of diesel fuel entrapped under the water table when imbibition stages are repeated.

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“…Many such holistic forecasts will require inclusion of the subsurface. Groundwater makes up over 90% of available freshwater (Feth 1973; Fetter 2018), and thus forms an important resource that contains appreciable thermal inertia that facilitates lags in the expression of changes in prevailing atmospheric temperature to aquatic systems. The degree of lagging is a function of characteristics of the aquatic system such as depth to water table, residence time and watershed properties, but also changes to flow systems such as those resulting from land‐use change that can mitigate or exacerbate effects of atmospheric change (e.g., Juckem et al 2008).…”

Section: Introductionmentioning

confidence: 99%

New Capabilities in MT3D‐USGS for Simulating Unsaturated‐Zone Heat Transport

Morway¹,

Feinstein

Hunt

et al. 2022

Groundwater

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Changes in climate and land use will alter groundwater heat transport dynamics in the future. These changes will in turn affect watershed processes (e.g., nutrient cycling) as well as watershed characteristics (e.g., distribution and persistence of cold-water habitat). Thus, groundwater flow and heat transport models at watershed scales that can characterize and quantify thermal impacts of surface temperature change on groundwater system temperatures may support forecasting changes to groundwater-linked ecosystems in riparian zones, streams, and lakes. Including unsaturated zone processes has previously been shown to be important for properly determining the timing and magnitude of groundwater recharge (Hunt et al. 2008). Similarly, heat transport dynamics in the saturated-zone, as well as connected surface-water systems, can be appreciably influenced by unsaturated-zone processes; in this way the unsaturated zone forms an inextricable link between the land surface where change occurs and the groundwater system that transmits that change. This paper presents new capabilities for the existing MT3D-USGS transport simulator by adding functionality for simulating heat transport through the unsaturated zone. New simulation capabilities are verified through comparison of simulation results with those of the variably saturated heat transport simulator VS2DH under steady and transient conditions for both water and heat flow. The new capabilities are assessed using a number of conceptualizations and include evaluations of convective and conductive heat flow. These additional capabilities increase the utility for applied watershed-scale simulations, which in turn may facilitate more realistic characterizations of temperature change on thermally sensitive ecosystems, such as stream habitat.

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Water facts and figures for planners and managers

Cited by 11 publications

References 8 publications

Limnological data from selected lakes in the San Francisco Bay region, California

Limnological data from selected lakes in the San Francisco Bay region, California

Effects of water table fluctuation on diesel fuel migration in one-dimensional laboratory study

New Capabilities in MT3D‐USGS for Simulating Unsaturated‐Zone Heat Transport

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