Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Hydrologic Alteration"”.
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Providing a Restoration Framework for Regulated Rivers
… 5-step version of the Ecological Limits of Hydrologic Alteration (ELOHA) framework (Poff et al. 2010). I carried out each of the steps in sequential order for unregulated and dam-regulated streams found in my region. The steps of my restoration framework are as follows: 1. Develop a natural …
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Ecologically relevant low flows for riverine benthic macroinvertebrates: characterization and application
Intensifying hydrologic alteration and the resultant degradation of river ecosystems worldwide have catalyzed a growing body of ecohydrological research into the relationships between flow regime attributes, physical habitat dynamics and biotic response, particularly for determining environmental …
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An Assessment of the Diverse Freshwater Turtle Fauna of Mississippi
… distributions and abundances, the Indicators of Hydrologic Alteration software was employed to detect drainage-wide hydrological alterations in the free-flowing Pascagoula River, the moderately altered Pearl River, and the heavily channelized and impounded Tombigbee River. The severely modified …
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PREDICTING CONTAMINANT TRANSFER FOLLOWING RE-ESTABLISHED CONNECTIVITY IN THE BOARDMAN RIVER
<p>Anthropogenic alteration of the environment began as soon as people settled the Great Lakes (GL) region with hydrologic alteration (dams) and discharges of man-made chemicals into the air and water as populations and industry expanded. Consequently, the GL became a reservoir of anthropogenic …
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Patterns of flow variability: consideration for river regulation and salmon management
… analysis, were combined with the Indicators of Hydrologic Alteration approach to analyse 850 years of station flow data from 17 rivers within 3 regions. The analyses focussed on functional flows of know/suspected influence on salmonid populations. Atlantic salmon (Salmo salar) is in decline …
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Assessment of the effect of climate change in anticipated water resources availability in arid climate zones
… periods of the streamflow. (3) Quantify the hydrological alterations of various flow characteristics utilise the Indicators of Hydrologic Alteration method, in addition to multi-regression, hydrologic sensitivity, and hydrologic model simulations. Climate change was the main factor reducing …
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Assessing the impact of greentree reservoir water management on red oak growth and anatomy in the lower Mississippi Alluvial Valley
… the past two centuries due to land clearing and hydrologic alteration. To preserve migratory waterfowl habitat, greentree reservoirs (GTRs) were established, providing artificial flooding during the fall and winter. Red oak species within GTRs provide vital resources, such as mast and habitat for …
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On the development of flow-ecology relationships for streams in coastal watersheds of southern California
Linking hydrologic alteration to the biotic responses of streams is essential for understanding and managing the effects of land use changes and other human influences on aquatic ecosystems. This study develops flow-ecology relationships for wadeable streams in coastal watersheds of southern …
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Impact of climate variability and human activities on water resources.
… dam construction, etc.) interact and affect the hydrological regime in some selected basins in the semi-arid region of southeastern Spain. To conduct a comprehensive causal analysis, this PhD Thesis used the Soil and Water Assessment Tool (SWAT) hydrological model as the main tool and combined it …
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Ecologically-focused calibration of hydrological models for environmental flow applications
Hydrologic alteration resulting from watershed urbanization is a common cause of aquatic ecosystem degradation. Developing environmental flow criteria for managing the effects of urbanization and other human influences requires quantitative flow-ecology relationships that link biological responses …
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EFFECTS OF FLOW REGIME ON FISHES AND FISHERIES: FROM LIFE HISTORIES TO ECOSYSTEM SERVICES
… results suggest that, due to collinearity of hydrologic variables, effects of sampling gear, and scale of analysis, applying and operationalizing the predictions of the TLHM in terms of hydrology may not be straightforward. here is a continued need to match high-quality biological data with …
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Modeling watershed management with an ecological objective - a multi-agent system based approach
… to addressing this task. Using the Indicators of Hydrologic Alteration (IHAs) to represent the environmental flow condition, genetic programming generated a quantitative relationship (equation) between natural flow regime metrics (hydrology) and fish community indices (ecology). After a robustness …
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Restoration and Water Management in the Atchafalaya River Basin, Louisiana
… variables in the ARB. Results from Indicators of Hydrologic Alteration were reduced to four management-relevant hydrologic variables using principal components analysis. Multiple regression was used to determine flow-ecology relationships and Pearson correlation coefficients, along with regression …