Searched for: collection%253Air
(161 - 180 of 231)

Pages

document
Euser, T. (author), Winsemius, H.C. (author), Hrachowitz, M. (author), Fenicia, F. (author), Uhlenbrook, S. (author), Savenije, H.H.G. (author)
journal article 2012
document
Temesgen, M. (author), Uhlenbrook, S. (author), Simane, B. (author), Van der Zaag, P. (author), Mohamed, Y. (author), Wenninger, Y. (author), Savenije, H.H.G. (author)
Adoption of soil conservation structures (SCS) has been low in high rainfall areas of Ethiopia mainly due to crop yield reduction, increased soil erosion following breaching of SCS, incompatibility with the tradition of cross plowing and water-logging behind SCS. A new type of conservation tillage (CT) involving contour plowing and the...
journal article 2012
document
Jonker, L. (author), Van der Zaag, P. (author), Gumbo, B. (author), Rockström, J. (author), Love, D. (author), Savenije, H.H.G. (author)
This paper reports the experience of a regional network of academic departments involved in water education that started as a project and evolved, over a period of 12 yr, into an independent network organisation. The paper pursues three objectives. First, it argues that it makes good sense to organise postgraduate education and research on water...
journal article 2012
document
Krier, R. (author), Matgen, P. (author), Goergen, K. (author), Pfister, L. (author), Hoffmann, L. (author), Kirchner, J.W. (author), Uhlenbrook, S. (author), Savenije, H.H.G. (author)
The complexity of hydrological systems and the necessary simplification of models describing these systems remain major challenges in hydrological modeling. Kirchner's (2009) approach of inferring rainfall and evaporation from discharge fluctuations by “doing hydrology backward” is based on the assumption that catchment behavior can be...
journal article 2012
document
Hrachowitz, M. (author), Savenije, H.H.G. (author), Bogaard, T.A. (author), Tetzlaff, D. (author), Soulsby, C. (author)
The complex interactions of runoff generation processes underlying the hydrological response of streams remain incompletely understood at the catchment scale. Extensive research has demonstrated the utility of tracers for both inferring flow paths distributions and constraining model parameterizations. While useful, the common use of linearity...
journal article 2012
document
Cai, H. (author), Savenije, H.H.G. (author), Toffolon, M. (author)
This paper explores different analytical solutions of the tidal hydraulic equations in convergent estuaries. Linear and quasi-nonlinear models are compared for given geometry, friction, and tidal amplitude at the seaward boundary, proposing a common theoretical framework and showing that the main difference between the examined models lies in...
journal article 2012
document
Zhang, E.F. (author), Savenije, H.H.G. (author), Chen, S.L. (author), Mao, X.H. (author)
An analytical model for tidal dynamics has been applied to the Yangtze Estuary for the first time, to describe the tidal propagation in this large and typically branched estuary with three-order branches and four outlets to the sea. This study shows that the analytical model developed for a single-channel estuary can also accurately describe the...
journal article 2012
document
Schaefli, B. (author), Van der Ent, R.J. (author), Woods, R. (author), Savenije, H.H.G. (author)
Soil-atmosphere feedback is a key for understanding the hydrological cycle and the direction of potential system changes. This paper presents an analytical framework to study the interplay between soil and atmospheric moisture, using as input only the boundary conditions at the upstream end of trajectory, assuming advective moisture transport...
journal article 2012
document
Gharari, S. (author), Hrachowitz, M. (author), Fenicia, F. (author), Savenije, H.H.G. (author)
Conceptual hydrological models often rely on calibration for the identification of their parameters. As these models are typically designed to reflect real catchment processes, a key objective of an appropriate calibration strategy is the determination of parameter sets that reflect a “realistic” model behavior. Previous studies have shown that...
journal article 2012
document
Keys, P.W. (author), Van der Ent, R.J. (author), Gordon, L.J. (author), Hoff, H. (author), Nikoli, R. (author), Savenije, H.H.G. (author)
It is well known that rivers connect upstream and downstream ecosystems within watersheds. Here we describe the concept of precipitationsheds to show how upwind terrestrial evaporation source areas contribute moisture for precipitation to downwind sink regions. We illustrate the importance of upwind land cover in precipitationsheds to sustain...
journal article 2012
document
Fenicia, F. (author), Kavetski, D. (author), Savenije, H.H.G. (author)
This paper introduces a flexible framework for conceptual hydrological modeling, with two related objectives: (1) generalize and systematize the currently fragmented field of conceptual models and (2) provide a robust platform for understanding and modeling hydrological systems. In contrast to currently dominant “fixed” model applications, the...
journal article 2011
document
Gharari, S. (author), Hrachowitz, M. (author), Fenicia, F. (author), Savenije, H.G. (author)
This paper presents a detailed performance and sensitivity analysis of a recently developed hydrological landscape classification method based on dominant runoff mechanisms. Three landscape classes are distinguished: wetland, hillslope and plateau, corresponding to three dominant hydrological regimes: saturation excess overland flow, storage...
journal article 2011
document
Westhoff, M.C. (author), Gooseff, M.N. (author), Bogaard, T.A. (author), Savenije, H.H.G. (author)
Hyporheic exchange is an important process that underpins stream ecosystem function, and there have been numerous ways to characterize and quantify exchange flow rates and hyporheic zone size. The most common approach, using conservative stream tracer experiments and 1?D solute transport modeling, results in oversimplified representations of the...
journal article 2011
document
Tekleab, S. (author), Uhlenbrook, S. (author), Mohamed, Y. (author), Savenije, H.H.G. (author), Temesgen, M. (author), Wenninger, J. (author)
The water balances of twenty catchments in the Upper Blue Nile basin have been analyzed using a top-down modeling approach based on Budyko’s hypotheses. The objective of this study is to obtain better understanding of water balance dynamics of upper Blue Nile catchments on annual and monthly time scales and on a spatial scale of meso scale to...
journal article 2011
document
Toffolon, M. (author), Savenije, H.H.G. (author)
In this paper we extend the validity of the classical linear solution for tidal hydrodynamics including the effects of width and depth convergence. Reworking such a solution in the light of externally defined, dimensionless parameters we are able to provide simple relationships to predict the most relevant features of the tidal wave at the...
journal article 2011
document
Hrachowitz, M. (author), Bohte, R. (author), Mul, M.L. (author), Bogaard, T.A. (author), Savenije, H.H.G. (author), Uhlenbrook, S. (author)
journal article 2011
document
Westhoff, M.C. (author), Bogaard, T.A. (author), Savenije, H.H.G. (author)
journal article 2011
document
Gharari, S. (author), Fenicia, F. (author), Hrachowitz, M. (author), Savenije, H.H.G. (author)
This paper presents a new type of hydrological landscape classification based on dominant runoff mechanisms. Three landscape classes are distinguished: wetland, hillslope and plateau, corresponding to three dominant hydrological regimes: saturation excess overland flow, storage excess sub-surface flow, and deep percolation. Topography, geology...
journal article 2011
document
Pande, S. (author), Savenije, H.H.G. (author), Bastidas, L.A. (author), Gosain, A.K. (author)
Inapplicability of state of the art hydrological models due to scarce data motivates the need for a modeling approach that can be well constrained to available data and still model the dominant processes. Such an approach requires embedded model relationships to be simple and parsimonious in parameters for robust model selection. Simplicity in...
journal article 2011
document
Van der Ent, R.J. (author), Savenije, H.H.G. (author)
It is difficult to quantify the degree to which terrestrial evaporation supports the occurrence of precipitation within a certain study region (i.e. regional moisture recycling) due to the scale- and shape-dependence of regional moisture recycling ratios. In this paper we present a novel approach to quantify the spatial and temporal scale of...
journal article 2011
Searched for: collection%253Air
(161 - 180 of 231)

Pages