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.
Results
Showing 1 to 20 of 91 for “"hydrological model"”.
-
Assessing the Reliability of Integrating global data with the GEOframe-NewAGE hydrological model
… are essential for meteorological and hydrological studies; however, they face challenges such as spatial variability, limited coverage, and instrument precision. In contrast, global precipitation products derived from Earth observation (EO) and reanalysis datasets provide broader …
-
The effects of input data degradation on hydrological model performance for a snowmelt dominated watershed
… data used as input to a hydrologic model is varied and the output compared to observed historical flows. Temperature and precipitation data were used to feed the National Weather Service River Forecast System (NWSRFS); this hydrologic model outputs streamflow and is used daily …
-
Calibration of the global hydrological model WGHM with water mass variations from GRACE gravity data
… for validation and calibration of large-scale hydrological models as the WaterGAP Global Hydrology Model (WGHM) which simulates the continental water cycle including its most important components, such as soil, snow, canopy, surface- and groundwater. Hitherto, WGHM exhibits significant …
-
Implementation of a snow routine into the hydrological model WASA-SED and its validation in a mountainous catchment
… hydrologic cycle. With the objective to improve model performance of the hydrological model WASA-SED (Water Availability in Semi-Arid environments - SEDiments) in catchments affected by snow and ice, a physically-based snow routine has been implemented into the model. The snow routine bases on …
-
An Evaluation of a Hydrological Model Used to Predict the Impact of Flow Attenuation on Downstream Flood Flows
… applied and assessed a reduced complexity hydrological model called Overflow, which was used to predict the impact of flow attenuation on downstream flood flows. The model behaviour was theoretically consistent with physical processes, allowing it to be calibrated for the River Seven, North …
-
An Analysis of Hydrological Model Uncertainty at the Local Stage of a Climate Change Impact Assessment in the Suir Catchment
… stage of a climate impact assessment. Impact model structural uncertainty and uncertainty due to equifinality of parameter sets are evaluated, in addition to uncertainty due to GCMs and emissions scenarios. The Suir catchment is employed as a case study area to analyse the changes in catchment …
-
Monitoring and modelling hydrological response and sediment yield in a North York Moors catchment : an assessment of predictive uncertainty in a coupled hydrological-sediment yield model
A fully distributed coupled hydrological-sediment yield model was developed. An assessment was made of the predictive uncertainty in the individual model predictions, as well as the uncertainty propagated from the primary hydrological model to the secondary sediment yield model, using the …
-
Precipitation analysis for a flood early warning system in the Manafwa River Basin, Uganda
… the Uganda Red Cross Society (URCS) to design a hydrological model for a precipitation based flood forecasting system for the Manafwa River Basin. The hydrological model relates precipitation with flood risk and flood extent. The main input for the model is the basin precipitation. The rainfall …
-
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 …
-
Ensemble-characterisation of satellite rainfall uncertainty and its impacts on the hydrological modelling of a sparsely gauged basin in Western Africa
… to drive various downstream environmental models and early warning systems (EWS). However, when operating at higher spatial and temporal resolutions SRFE contain large uncertainties which propagate through the downstream models.This thesis uses the TAMSAT1 SRFE algorithm developed by Teo …
-
Characterization of the spatial and temporal variability in pan-Arctic, terrestrial hydrology
… the methods to estimate components of the arctic hydrological cycle, the numerous biases and uncertainties associated with the techniques, and suggestions for future research needs. The studies described here focus on quantitative models and methods for predicting the spatial and temporal …
-
Flood modelling using data available on the Internet
… to use as input to a free and open source hydrological model for use in a flood monitoring system. As such, the monitoring system would be SensorWeb enabled. The study area is the C83A quaternary catchment (746 km2) in the Northern Free State, part of the Vaal primary catchment in South …
-
Rainfall Organization and Geomorphologic Controls on the Flood Response of Mild-slope Basins in the South Atlantic Region of US
… the hydrologic response from observational and modeling perspectives. For understanding the basin scale effect, the Tar-River Basin is divided into four cascade sub-basins ranging from 1106 km<sup>2</sup> up to 5654 km<sup>2</sup>. The study evaluates the catchments’ response to rainfall for a …
-
Assessing the Potential Effects of Climate Variability on Reservoir Water Volume in North-Central Texas Using GIS and Models: A Case Study of Ray Roberts Lake.
… Data from each scenario was input to a hydrological model (HEC-HMS) to calculate watershed runoff to Lake Ray Roberts. Model parameters are determined using Geographic Information System (GIS). The water balance was calculated for current and future water demand and resulting change in …
-
Information and Decision-Support for Robust Adaptation of Irish Water Resources to Climate Change
… signals of anthropogenic climate change from hydrological observations, along with uncertainties in future climate change impacts. To date in Ireland, studies with regard to climate change have focused on the traditional top-down, climate-scenario-driven impact assessments. Little research has …
-
End-to-End Ensemble Modelling for Water Resources Planning Under Uncertainty
A hydrological model ensemble, considering two model structures (CatchMOD and PDM), parameter uncertainty and two contrasting methods for estimating potential evapotranspiration (PET), is developed to investigate the relative significance of different sources of uncertainty for water resources …
-
Challenges of regional hydrological modelling in the Elbe River basin : investigations about model fidelity on sub-catchment level
… had to be provided. The semi-distributed eco-hydrological model SWIM was utilised for this task. According to scenario simulations driven by the stochastical climate model STAR, the region would get distinctly drier. However, this thesis focuses on the challenge of meeting the requirement of …
-
Bridging the gap : comparative analysis of a gap filling X-band radar QPE algorithms and their implications for nowcasting and hydrological modeling
… Estimations (QPE) are foundational for hydrological modeling and proactive watershed management. This research examines how a single X-Band radar bridges the gap in QPE estimation and its implications for hydrological modeling and nowcasting. Initially, a comparison between X-band and …
-
Implementation and evaluation of the Pitman model in seasonal hydrological forecasting mode using the Kraai River catchment in Eastern Cape South Africa as a case study
… of the Pitman/Water Resources Simulation Model 2012 model (WR2012) in seasonal hydrological forecasting mode. The aim of the study is to improve the understanding of seasonal hydrological forecasting by evaluating the performance of a hydrological model (Pitman Model) in the seasonal …
-
Estimation of catchment flood potential using satellite data
… heat flux is used in a simple convective model to estimate the height of the atmospheric boundary layer and the velocity of an ascending parcel of air. From this the probability of convective storm occurrence and maximum rainfall is calculated. By inputting the rainfall into a simple, …
Page 1 of 5