Completion Reports

Permanent URI for this collection

https://hdl.handle.net/10217/195464

In addition to the report in this digital collection, two other reports, Irrigation Practices, Water Consumption, & Return Flows in Colorado's Lower Arkansas River Valley: Field and Model Investigations and Toward Optimal Water Management in Colorado's Lower Arkansas River Valley: Monitoring and Modeling to Enhance Agriculture and Environment were published jointly with the Colorado Agricultural Experiment Station and can be found in Colorado Agricultural Experiment Station digital collections.

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Now showing 1 - 20 of 237

Open Access
A modeling approach for assessing the feasibility of ground-water withdrawal from the Denver Basin during periods of drought
(Colorado State University. Libraries, 1991-04) Jaunarajs, Sigurd R., author; Poeter, Eileen, author; Colorado Water Resources Research Institute, Colorado State University, publisher
Open Access
A river basin network model for conjunctive use of surface and groundwater: program CONSIM
(Colorado State University. Libraries, 1983) Labadie, John W., author; Phamwon, Sanguan, author; Lazaro, Rogelio C., author; Colorado Water Resources Research Institute, Colorado State University, publisher
Open Access
A State-of-the-art review: final report: urban-metropolitan institutions for water planning, development and management: an analysis of usages of the term "institutions"
(Colorado State University. Libraries, 1972) Wengert, Norman I., author; Environmental Resources Center, Colorado State University, publisher
Open Access
A system for geologic evaluation of pollution potential at mountain dwelling sites
(Colorado State University. Libraries, 1975) Waltz, James P., author; Environmental Resources Center, Colorado State University, publisher
Development of mountain homesites is accelerating in the Rocky Mountains of central Colorado. These homesites often require individual water wells and sewage disposal systems. Unfortunately, the widely used septic tank-leach field system generally is not suited for use in the mountainous terrain where soils are thin or missing. Although current federal regulations call for six feet or more of soil at the leach field site, many of the individual sewage disposal systems now in operation in the Rocky Mountain Region of Colorado fail to meet this requirement. Sewage effluent at these sites may directly enter bedrock fractures and travel large distances without being purified. As a consequence, contamination of streams, lakes, and ground water from these malfunctioning leach fields has become a problem of increasing magnitude. Investigations of geologic, topographic, and hydrologic conditions at over 100 homesites in the Rocky Mountains of north-central Colorado have resulted in the development of objective criteria for evaluating pollution potential at mountain homesites. In addition, the results of these investigatians indicate that contamination of water wells may be decreased significantly where geologic conditions are considered in the selection of sites for leach fields and wells. Although the results of these studies should be considered preliminary, they do tend to confirm that the orientation of jointing surfaces in the bedrock significantly affects the travel path of contaminants.
Open Access
A systematic treatment of the problem of infiltration
(Colorado State University. Libraries, 1971) Morel-Seytoux, Hubert J., author; Environmental Resources Center, Colorado State University, publisher
Open Access
A water handbook for metal mining operations
(Colorado State University. Libraries, 1981) Wildeman, Thomas R., author; Colorado Water Resources Research Institute, Colorado State University, publisher
Open Access
A watershed information system
(Colorado State University. Libraries, 1980) Thomsen, Anton G., author; Striffler, William D. (William David), author; Colorado Water Resources Research Institute, Colorado State University, publisher
Open Access
Achieving urban water conservation: a handbook
(Colorado State University. Libraries, 1977-09) Flack, J. Ernest (John Ernest), 1929-, author; Weakley, Wade P., author; Hill, Duane W., author; Colorado Water Resources Research Institute, Environmental Resources Center, Colorado State University, publisher
Open Access
Achieving urban water conservation: testing community acceptance
(Colorado State University. Libraries, 1977) Snodgrass, Robert Warren, author; Hill, Duane W., author; Colorado Water Resources Research Institute, Environmental Resources Center, Colorado State University, publisher
Employing a Q-Sort Factor Analytical Design, this study sought to develop a system for parametric representation of non-linear data structures using data acquired from representative samples of entire communities. The representations are specified in terms of a spatial metric "social space," an analog of psychological space. The defined social space is then characterized and used to define the community action zone which is hypothesized to a zone of community acceptance for those policies falling within its bounds. Such a zone for the communities of Lafayette and Louisville, Colorado was used to define socially and politically feasible water conservation policies for the communities. Policies with the highest feasibility for acceptance were legal restrictions on water use and restrictions on growth and development. The next most feasible were horticultural techniques and economic solutions. Reuse for agricultural purposes also appeared to have some political feasibility. This study demonstrated the usefulness of survey research in delineating viable water conservation programs.
Open Access
Acid mine drainage: streambed sorption of copper, cadmium and zinc
(Colorado State University. Libraries, 1990) Macalady, Donald L., author; Smith, Kathleen S., author; Ranville, James F., author; Colorado Water Resources Research Institute, Colorado State University, publisher
Open Access
Adjoint modeling to quantify stream flow changes due to aquifer pumping
(Colorado State University. Libraries, 2013-11) Neupauer, Roseanna M., author
As populations grow and demand for water increases, new sources of water must be found. If groundwater resources are developed to meet these growing demands, the increased pumping of aquifers should not reduce flows in rivers to levels that would limit the availability of water for drinking water supply, irrigation, and riparian habitat. Stream depletion is the term for the change in the river flow rate due to pumping in an aquifer that is hydraulically connected to the river. In many regions of the U.S., a new well cannot be sited until it is shown that pumping the new well will not cause substantial stream depletion. Numerical simulations are typically used to quantify stream depletion. In the standard approach, two numerical simulations are run—one without pumping and one with pumping in a well at the proposed location. In both simulations, the water flux between the river and aquifer is calculated, and the difference between these fluxes is the stream depletion due to pumping at the proposed well location. If multiple well locations are considered, one addition simulation must be run for each additional potential well location; thus, this approach can be inefficient for siting new wells. The goal this research was to develop an adjoint-based modeling approach to efficiently quantify stream depletion due to aquifer pumping. In a single simulation of an adjoint model, stream depletion is calculated for a well at any location in the aquifer; thus, it is computationally efficient when the number of well locations or possible well locations is large. The adjoint approach was developed to be used with standard groundwater flow simulators, and therefore can be applied in practice. The research included rigorous development of the adjoint equation for calculating stream depletion in confined and unconfined aquifers with various models of groundwater/surface water interaction, along with numerical simulations to verify the adjoint equation. In addition, we used the adjoint method to investigate the sensitivity of stream depletion to the hydraulic conductivity of the stream channel, a parameter which is known to be uncertain.
Open Access
Adsorption of copper, cadmium and zinc on suspended sediments in a stream contaminated by acid mine drainage: the effect of seasonal changes in dissolved organic carbon
(Colorado State University. Libraries, 1991) Macalady, Donald L., author; Ranville, James F., author; Smith, Kathleen S., author; Daniel, Stephen R., author; Colorado Water Resources Research Institute, Colorado State University, publisher
Open Access
Agricultural to urban water transfers in Colorado: an assessment of the issues and options
(Colorado State University. Libraries, 1993-12) Rice, Teresa A., author; MacDonnell, Lawrence J., author; Colorado Water Resources Research Institute, publisher
With constrains on the additional development of water supplies and in the face of growing urban demands for water cites have increasingly been turning to the water transfer process as a means of expanding their supplies. Urban encroachment onto formerly irrigated croplands long has caused the use of irrigation water to change to urban use. To make the transfers economically warranted the size of the transfers tends to be large. This transfer of large quantities of water from often rural areas with little alternative economic opportunity is prompting many western states to revisit their water transfer laws. This report examines approaches taken in the western states to both better facilitate the water transfer process and better address so-called third party effects. The report focuses initially on water transfer law and procedure in Colorado and notes that Colorado emphasizes a single kind of transaction--one in which there is a permanent purchase of a water right and a consequent total cessation of the associated activity. The report then provides a detailed evaluation of a variety of approaches used in other western states involving (1) conditioning water transfers, (2) requiring reduced water use, (3) providing incentives to conserve, and (4) facilitating short-term transfers. Finally recommendations are made for changes in Colorado law and procedure providing incentives to save water, establishing water banks, and addressing third party effects.
Open Access
Agricultural water conservation in the Colorado River basin: alternatives to permanent fallowing research synthesis and outreach workshops, part 1 of 5
(Colorado State University. Libraries, 2017-12) Udall, Brad, author; Peterson, Greg, author
Open Access
Agricultural water conservation in the Colorado River basin: alternatives to permanent fallowing research synthesis and outreach workshops, part 2 of 5
(Colorado State University. Libraries, 2017-12) Udall, Brad, author; Peterson, Greg, author
Open Access
Agricultural water conservation in the Colorado River basin: alternatives to permanent fallowing research synthesis and outreach workshops, part 3 of 5
(Colorado State University. Libraries, 2017-12) Udall, Brad, author; Peterson, Greg, author
Open Access
Agricultural water conservation in the Colorado River basin: alternatives to permanent fallowing research synthesis and outreach workshops, part 4 of 5
(Colorado State University. Libraries, 2017-12) Udall, Brad, author; Peterson, Greg, author
Open Access
Agricultural water conservation in the Colorado River basin: alternatives to permanent fallowing research synthesis and outreach workshops, part 5 of 5
(Colorado State University. Libraries, 2017-12) Udall, Brad, author; Peterson, Greg, author
Open Access
An application of multi-variate analysis in hydrology
(Colorado State University. Libraries, 1972) Yevjevich, Vujica M., 1913-, author; Dhyr-Nielsen, M., author; Schulz, E. F., author; Environmental Resources Center, Colorado State University, publisher
Open Access
An approach to modeling a stream aquifer system for conjunctive management
(Colorado State University. Libraries, 1990-05) Zhang, Chuan-Mian, author; Morel-Seytoux, Hubert J., author; Young, Robert A. (Robert Alton), 1931-, author; Colorado Water Resources Research Institute, Colorado State University, publisher