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 20 of 934 for “"hydrological"”.
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Statistical-Based Hydrological Simulation and Inference
Hydrological models have been used as essential tools for water resources planning and understanding the mechanisms in the water cycle. The rapid advance in information science and computational power in recent decades has encouraged hydrologists to solve water problems through data-driven …
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Ecological-Hydrological Feedback in Forested Wetlands
In forested wetlands, the biotic and abiotic consequences of water level variability is not well understood. The effects of flooding on carbon and water exchanges are important knowledge gaps where progress could benefit management of natural resources and predicting of changes in surface …
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Hydrological Drought - a Study across Europe
… and processes, the present study investigated hydrological drought characteristics in space and time and their large-scale atmospheric driving forces in Europe. On the basis of daily streamflow data of more than 600 European rivers for 1962-1990, two types of events were defined: streamflow …
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Hydrological Frequency Analysis under Nonstationary Conditions
The hydrological frequency analysis (HFA) evaluates the recurrence of extreme flow and precipitation events and guides water-related management and risk assessment. The conventional HFA assumes stationarity in the underlying process. However, climate change and other changes in the watersheds may …
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Using motes for high resolution hydrological measurement
Low cost, low power wireless sensors (motes) promise to revolutionize environmental data collection, but are they currently refined enough for widespread use by hydrologists? Their viability as a replacement for traditional data collection techniques was investigated in a 7 ha forested watershed in …
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Homogenization and analysis of hydrological time series
In hydrological studies, it is very important to properly analyze the relationship among the different components of the water cycle, due to the complex feedback mechanisms typical of this system. The analysis of available time series is hence a fundamental step, which has to be performed before …
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Multivariate hydrological frequency analysis and risk mapping
<p>In hydrological frequency analysis, it is difficult to apply standard statistical methods to derive multivariate probability distributions of the characteristics of hydrologic or hydraulic variables except under the following restrictive assumptions: (1) variables are assumed independent, (2) …
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Hydrological responses to moorland land-use change
… of the effects of land-use change on hydrological systems have considered the modification of forest areas. In this thesis, a headwater area in the North York Moors is used to examine the consequences of maintaining a land management regime which has received comparatively little …
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Comparison of hydrological and groundwater design methods
One of the objectives in this thesis is to provide a handbook on groundwater hydrology for the practical engineer. A handbook should be a useful and dependable servant to its owner and user. In order to fill this role, handbooks in different fields must differ in accordance with the degree of …
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Hydrological disasters : designing to shelter in place
The focus of this thesis is hydrological disasters and the question it attempts to answer is: how can we design and implement housing structures along U.S. coastlines that fully withstand hydrological disasters? Priority and severity is shown by increasing trends in natural disaster occurrence …
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Hydrological Analysis of Nicaragua in a Changing Climate
… the tropical country of Nicaragua for further hydrological assessment. Using a small network of stations along the north-northwest region of Nicaragua as reference, I evaluated two gridded precipitation datasets: the Tropical Rainfall Measuring Mission (TRMM) and the Climate Hazards Group …
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HYDROLOGICAL CHARACTERIZATION OF A SULPHIDE WASTE ROCK DUMP
… flow regime systems. All of the surface hydrological components are required in order to equalize the surface water balance for the waste rock dump. The components of the surface hydrological budget during the one year study period over the area of the waste rock dump are as follows: …
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Hydrological modeling of mountain catchments in Central Asia
… needed to develop water management strategies. Hydrological modeling helps to improve our knowledge of the regional water cycle, and it can be used to gain a better understanding of past changes or estimate future hydrologic changes in view of projected changes in climate. However, due to the …
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Unveiling invisible water flows in socio-hydrological systems
L'abstract è presente nell'allegato / the abstract is in the attachment
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Sensitivity-based guided automatic calibration of hydrological models
A new method for efficient calibration of complex hydrological models that combines Dynamically Dimensioned Search (DDS) global optimization algorithm with Global Sensitivity Analysis (GSA) methods is introduced. This approach, which is called sensitivity-informed DDS, utilizes sensitivity indices …
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Large-scale Process-based Urban Hydrological Modeling Framework
… natural and anthropogenic factors in influencing hydrological responses, highlighting the varied impacts of BUSNs and reservoir operations on flooding. Our proposed modeling framework is an effective tool for simulating urban hydrological responses under different hydroclimate conditions, …
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Seasonal hydrological prediction in Great Britain – an assessment
This thesis assesses seasonal hydrological prediction in Great Britain. Firstly, the study evaluates river flow prediction using climate model output to drive a rainfall-runoff model in the Dyfi basin, Wales. Results show that climate model precipitation can not skilfully simulate Dyfi discharge. …
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Hydrological modelling with components: the OMS3 NewAge-JGrass system
… in general at the basin scale. As a modern hydrological modelling, it is composed of two parts: (i) the system for data and results visualization based on the Geographic Information System uDig and (ii) the component based modelling system. All the system is based on Java because of its …
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Hydrological regime changes in a Canadian Prairie wetland basin
… processes. This study evaluates the detailed hydrological impact of regional changes to climate on an instrumented research catchment, the Smith Creek Research Basin (SCRB); an unregulated, wetland and agriculture dominated prairie catchment in south-eastern Saskatchewan. Wetlands have been …
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