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Erosion Predictions by Empirical Models in a Mountainous Watershed in Nepal
Mountainous Watershed Nepal
2015/1/8
Soil erosion is a crucial problem in Nepal where more than 80% of the land area is mountainous. In this study, two commonly used empirical soil erosion models, Revised Universal Soil Loss Equation (RU...
Uncertainty in the determination of soil hydraulic parameters and its influence on the performance of two hydrological models of different complexity
soil hydraulic parameters performance two hydrological models different complexity
2010/2/20
Data of soil hydraulic properties forms often a limiting factor in unsaturated zone modelling, especially at the larger scales. Investigations for the hydraulic characterization of soils are time-cons...
Estimation and propagation of parametric uncertainty in environmental models
Estimation propagation parametric uncertainty environmental models
2009/12/4
It is proposed that a numerical environmental model cannot be justified for predictive tasks without an implicit uncertainty analysis which uses reliable and transparent methods. Various methods of un...
Calibration of physically based models:back to basics?
Calibration physically based models basics
2009/12/4
The modelling of extreme hydrological events often suffers from a lack of available data. Physically based models are the best available modelling option in such situations, as they can in principle p...
Comparison of quadratic and non-linear programming (QP and NLP) optimization models in groundwater management
quadratic and non-linear programming optimization models groundwater management
2009/12/4
This project is concerned with the comparison of two algorithms used in groundwater management models, based on Quadratic Programming (QP) and Non-linear Programming (NLP) models.A quadratic objective...
Calibration of nearshore process models ATitlemdash;application of a hybrid genetic algorithm
Calibration nearshore process models ATitlemdash hybrid genetic algorithm
2009/12/4
The physically realistic functions implemented in nearshore process models are governed by parameters that usually do not represent measurable attributes of the nearshore and, therefore, need to be de...
The physical components of catchments that are commonly included in deterministic
rainfall-runoff models are examined. Data are presented which can be
used for design purposes, to provide a guide to...
Inter-Comparison of two Snow Models with Different Complexity using Data from an Alpine Site
Inter-Comparison Snow Models Alpine Site
2009/10/22
This contribution describes the modelization of the snow cover evolution with the two physically based snow models CROCUS and ESCIMO at the Col de Porte station (1,325 m a.s.l., French Alps) for the ...
A novel approach to parameter uncertainty analysis of hydrological models using neural networks
hydrological models neural networks Artificial Neural Network
2009/7/22
In this study, a methodology has been developed to emulate a time consuming Monte Carlo (MC) simulation by using an Artificial Neural Network (ANN) for the assessment of model parametric uncertainty. ...
Estimation of actual evapotranspiration of Mediterranean perennial crops by means of remote-sensing based surface energy balance models
evapotranspiration surface energy balance Mediterranean perennial crops
2009/7/22
Actual evapotranspiration from typical Mediterranean crops has been assessed in a Sicilian study area by using surface energy balance (SEB) and soil-water balance models. Both modelling approaches us...
Analysing the temporal dynamics of model performance for hydrological models
temporal dynamics self-organizing maps hydrological models
2009/7/22
The temporal dynamics of hydrological model performance gives insights into errors that cannot be obtained from global performance measures assigning a single number to the fit of a simulated time ser...
Comparison of three stream tube models predicting field-scale solute transport
convective lognormat transfer stochastic stream tube solute transport
2009/6/8
In this paper the relation between local- and field-scale solute transport parameters in an unsaturated soil profile is investigated. At two experimental sites, local-scale steady-state solute transp...
A comparison of methods for estimating soil characteristics in regional acidification models; an application of the MAGIC model to Scotland
Acid Neutralising Capacity soil depth soil physico-chemical
2009/6/5
The results from an application of MAGIC (Model of Acidification of Groundwater In Catchments) to 733 Scottish catchments are presented. The availability of representative, good quality soil data is f...
The comparison of two models that determine the effects of a vegetation canopy on passive microwave emission
passive microwave emission vegetation canopy microwave brightness temperature
2009/5/26
Two contrasting models are used to account for the effects of vegetation on microwave emission from the soil. These are: a simple model which requires two empirically derived parameters as input data ...
Utility of different data types for calibrating flood inundation models within a GLUE framework
Generalised Likelihood Uncertainty Estimation GLUE framework flood inundation
2009/5/18
To translate a point hydrograph forecast into products for use by environmental agencies and civil protection authorities, a hydraulic model is necessary. Typical one- and two-dimensional hydraulic mo...