Hydrology and Earth System Sciences

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Attributing regional trends of evapotranspiration and gross primary productivity with remote sensing: a case study in the North China Plain
Hydrology and Earth System Sciences - Tập 21 Số 1 - Trang 295-310
Xingguo Mo, Xuejuan Chen, Shi Hu, Suxia Liu, Jun Xia
Abstract. Attributing changes in evapotranspiration (ET) and gross primary productivity (GPP) is crucial for impact and adaptation assessment of the agro-ecosystems to climate change. Simulations with the VIP model revealed that annual ET and GPP slightly increased from 1981 to 2013 over the North China Plain. The tendencies of both ET and GPP were upward in the spring season, while they w...... hiện toàn bộ
A worldwide analysis of trends in water-balance evapotranspiration
Hydrology and Earth System Sciences - Tập 17 Số 10 - Trang 4177-4187
Anna Ukkola, Iain Colin Prentice
Abstract. Climate change is expected to alter the global hydrological cycle, with inevitable consequences for freshwater availability to people and ecosystems. But the attribution of recent trends in the terrestrial water balance remains disputed. This study attempts to account statistically for both trends and interannual variability in water-balance evapotranspiration (ET), estimated fro...... hiện toàn bộ
Geostatistical radar-raingauge combination with nonparametric correlograms: methodological considerations and application in Switzerland
Hydrology and Earth System Sciences - Tập 15 Số 5 - Trang 1515-1536
R. Schiemann, Rebekka Erdin, Marco Willi, Christoph Frei, Marc Berenguer, Daniel Sempere‐Torres
Abstract. Modelling spatial covariance is an essential part of all geostatistical methods. Traditionally, parametric semivariogram models are fit from available data. More recently, it has been suggested to use nonparametric correlograms obtained from spatially complete data fields. Here, both estimation techniques are compared. Nonparametric correlograms are shown to have a substantial ne...... hiện toàn bộ
Evaluation of radar-gauge merging methods for quantitative precipitation estimates
Hydrology and Earth System Sciences - Tập 13 Số 2 - Trang 195-203
Edouard Goudenhoofdt, Laurent Delobbe
Abstract. Accurate quantitative precipitation estimates are of crucial importance for hydrological studies and applications. When spatial precipitation fields are required, rain gauge measurements are often combined with weather radar observations. In this paper, we evaluate several radar-gauge merging methods with various degrees of complexity: from mean field bias correction to geostatis...... hiện toàn bộ
Balancing ecosystem services with energy and food security – Assessing trade-offs from reservoir operation and irrigation investments in Kenya's Tana Basin
Hydrology and Earth System Sciences - Tập 18 Số 8 - Trang 3259-3277
Anthony Hurford, Julien Harou
Abstract. Competition for water between key economic sectors and the environment means agreeing allocations is challenging. Managing releases from the three major dams in Kenya's Tana River basin with its 4.4 million inhabitants, 567 MW of installed hydropower capacity, 33 000 ha of irrigation and ecologically important wetlands and forests is a pertinent example. This research seeks first...... hiện toàn bộ
Field data collection and analysis of canopy and litter interception in commercial forest plantations in the KwaZulu-Natal Midlands, South Africa
Hydrology and Earth System Sciences - Tập 16 Số 10 - Trang 3717-3728
H. H. Bulcock, Graham Jewitt
Abstract. It is well accepted that the total evaporation in forested areas is greater than in grasslands, largely due to the differences in the amount of rainfall that is intercepted by the forest canopy and litter and due to higher transpiration rates. However, interception is the least studied of these components of the hydrological cycle. The study aims to measure and quantify the canop...... hiện toàn bộ
Multi-criteria calibration of a conceptual runoff model using a genetic algorithm
Hydrology and Earth System Sciences - Tập 4 Số 2 - Trang 215-224
Jan Seibert
Abstract. Abstract: Calibration of a model against more than one output variable is important for reliable simulations of internal processes. In this study, a genetic algorithm combined with local optimisation was proposed for automatic single- and multi-criteria calibration of the HBV model, a conceptual runoff model. The model and the optimisation algorithm were applied in two catchments...... hiện toàn bộ
Locality-based 3-D multiple-point statistics reconstruction using 2-D geological cross sections
Hydrology and Earth System Sciences - Tập 22 Số 12 - Trang 6547-6566
Qiyu Chen, Grégoire Mariethoz, Gang Liu, Alessandro Comunian, Xiaogang Ma
Abstract. Multiple-point statistics (MPS) has shown promise in representing complicated subsurface structures. For a practical three-dimensional (3-D) application, however, one of the critical issues is the difficulty in obtaining a credible 3-D training image. However, bidimensional (2-D) training images are often available because established workflows exist to derive 2-D sections from s...... hiện toàn bộ
Evaluation of satellite rainfall estimates over Ethiopian river basins
Hydrology and Earth System Sciences - Tập 15 Số 5 - Trang 1505-1514
T. G. Romilly, Mekonnen Gebremichael
Abstract. High resolution satellite-based rainfall estimates (SREs) have enormous potential for use in hydrological applications, particularly in the developing world as an alternative to conventional rain gauges which are typically sparse. In this study, three SREs have been evaluated against collocated rain gauge measurements in Ethiopia across six river basins that represent different r...... hiện toàn bộ
Global multi-scale segmentation of continental and coastal waters from the watersheds to the continental margins
Hydrology and Earth System Sciences - Tập 17 Số 5 - Trang 2029-2051
Goulven G. Laruelle, Hans H. Dürr, Ronny Lauerwald, Jens Hartmann, Caroline P. Slomp, Nicolas Goossens, P. Régnier
Abstract. Past characterizations of the land–ocean continuum were constructed either from a continental perspective through an analysis of watershed river basin properties (COSCATs: COastal Segmentation and related CATchments) or from an oceanic perspective, through a regionalization of the proximal and distal continental margins (LMEs: large marine ecosystems). Here, we present a global-s...... hiện toàn bộ
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