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Validation of the Operational Msg-seviri Snow Cover Product Over A...

By: J. Parajka; Z. Akyurek; S. Surer

Description: Geodetic and Geographic Information Technologies, Middle East Technical University, Ankara, Turkey. The objective of this study is to evaluate the mapping accuracy of the MSG-SEVIRI operational snow cover product over Austria. The SEVIRI instrument is on board of the geostationary Meteosat Second Generation (MSG) satellite. The snow cover product provides 32 images per day with a relatively low spatial resolution of 5 km over Austria. The mapping a...

Aminou, D. M. A.: MSG's SEVIRI instrument, ESA Bull.-Eur. Space, 111, 15–17, 2002.; Blöschl, G.: Scaling issues in snow hydrology, Hydrol. Process., 13, 2149–2175, 1999.; Blöschl, G. and Kirnbauer, R.: Point snowmelt models with different degrees of complexity – internal processes, J. Hydrol., 129, 127–147, 1991.; Blöschl, G. and Kirnbauer, R.: An analysis of snow cover patterns in a small Alpine catchment, Hydrol. Process., 6, 99–109, 1992.; Blöschl, G., Gutknecht, D., ...

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Satellite Remote Sensing of Water Turbidity in Alqueva Reservoir a...

By: R. Salgado; M. J. Costa; M. Potes

Description: Évora Geophysics Centre (CGE), University of Évora, Rua Romão Ramalho 59, 7000-671 Évora, Portugal. The quality control and monitoring of surface freshwaters is crucial, since some of these water masses constitute essential renewable water resources for a variety of purposes. In addition, changes in the surface water composition may affect physical properties of the lake water, such as temperature, which in turn may impact exchanges with the lower trop...

Friedl, G. and Wüest, A.: Disrupting biogeochemical cycles, Consequences of damming, Aquat. Sci., 64, 55–65, 2002.; Alikas, K. and Reinart, A.: Validation of the MERIS products on large European lakes: Peipsi, Vänern and Vättern, Hydrobiologia, 599, 161–168, 2008.; Bukata, R. P., Jerome, J. H., Kondratyev, K. Y., and Pozdnyakov, D. V.: Optical Properties and Remote Sensing of Inland and Coastal Waters, CRS Press, 135–250, 1995.; Chapman, D.: Water Quality Assessments: a ...

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Stochastic Generation of Annual, Monthly and Daily Climate Data: a...

By: T. A. McMahon; R. Srikanthan

Description: Hydrology Unit, Bureau of Meteorology, Melbourne, Australia / University of Melbourne, Parkville, Australia. The generation of rainfall and other climate data needs a range of models depending on the time and spatial scales involved. Most of the models used previously do not take into account year to year variations in the model parameters. Long periods of wet and dry years were observed in the past but were not taken into account. Recently, Thyer and K...

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Detection of Global Runoff Changes: Results from Observations and ...

By: L. Marchand; B. Decharme; A. Ribes; R. Alkama

Description: Groupe d'étude de l'atmosphère météorologique (GAME), UMR3589, CNRM/GAME – Météo-France, Toulouse, France. This paper assesses the detectability of changes in global streamflow. First, a statistical detection method is applied to observed (no missing data which represent 42% of global discharge) and reconstructed (gaps are filled in order to cover a larger area and about 60% of global discharge) streamflow. Observations show no change over the 1958–1992 ...

Adam, J. C. and Lettenmaier, D. P.: Application of new precipitation and reconstructed streamflow products to streamflow trend attribution in northern Eurasia, J. Climate, 21, 1807–1828, doi:10.1175/2007JCLI1535.1, 2008.; Adam, J. C., Haddeland, I., Su, F., and Lettenmaier, D. P.: Simulation of reservoir influences on annual and seasonal streamflow changes for the Lena, Yenisei and Ob rivers, J. Geophys. Res., 112, D24...

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A Bayesian Spatial Assimilation Scheme for Snow Coverage Observati...

By: H. Rue; S. Kolberg; L. Gottschalk

Description: SINTEF Energy Research, Sem Sælands vei 11, 7465 Trondheim, Norway. A spatial probability distribution of the variables in a parametric snow depletion curve (SDC) is tailored to the assimilation of satellite snow cover data into a gridded hydrological model. The assimilation is based on Bayes' theorem, in which the proposed distribution represents the a priori information about the SDC variables. From the prior gridded maps of snow storage and accumulat...

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On the Reproducibility and Repeatability of Laser Absorption Spect...

By: A. Gobbi; B. Stenni; M. Šanda; S. Wrede; M. Borga; T. A. Bogaard; D. Penna; M. Bonazza; Z. Chárová; B. M. C. Fischer

Description: Department of Land and Agro-Forest Environments, University of Padova, Padova, Italy. The aim of this study was to analyse the reproducibility of off-axis integrated cavity output spectroscopy (OA-ICOS)-derived δ2H and δ18O measurements on a set of 35 water samples by comparing the performance of four laser spectroscopes with the performance of a conventional mass spectrometer under typical laboratory conditions. All samples were a...

Aggarwal, P. K., Ahmad, T., Groening, M., Gupta, M., Owano, T., and Baer, D.: Laser spectroscopic analysis of stable isotopes in natural waters: a low-cost, robust technique for the use of environmental isotopes in hydrological and climate studies, Eos Trans. AGU, 87(52), Fall Meeting Supplement, Abstract H51D-504, 2006.; Baer, D. S., Paul, J. B., Gupta, M., and O'Keefe, A.: Sensitive absorption measurements in the near-infrared region using off-axis integrated-cavity-ou...

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Synchronicity of Historical Dry Spells in the Southern Hemisphere ...

By: A. S. Kiem; D. C. Verdon-kidd

Description: Environmental and Climate Change Research Group, School of Environmental and Life Sciences, Faculty of Science and IT, University of Newcastle, Newcastle, Australia. A shift in climate occurred during the mid-1970s that affected the hydroclimate of the Southern Hemisphere resulting in drying trends across continental regions including Australia, New Zealand and southern and western Africa. There is also anecdotal evidence of other periods of climatic syn...

IOCI: Climate Variability and Change in South West Western Australia, Indian Ocean Climate Initiative (IOCI) Panel, Perth, Australia, 2002.; Arblaster, J. M. and Meehl, G. A.: Contributions of external forcings to southern annular mode trends, J. Climate, 19, 2896–2905, doi:10.1175/JCLI3774.1, 2006.; Ashok, K., Guan, Z., and Yamagata, T.: Influence of the Indian Ocean Dipole on the Australian winter rainfall, Geophys. Res....

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Water Level Forecasting Through Fuzzy Logic and Artificial Neural ...

By: G. Mascellani; M. Franchini; A. Bárdossy; S. Alvisi

Description: Dipartimento di Ingegneria, Università degli Studi di Ferrara, Italia. In this study three data-driven water level forecasting models are presented and discussed. One is based on the artificial neural networks approach, while the other two are based on the Mamdani and the Takagi-Sugeno fuzzy logic approaches, respectively.

All of them are parameterised with reference to flood events alone, where water levels are higher th...

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Examination of Homogeneity of Selected Irish Pooling Groups : Volu...

By: C. Cunnane; S. Das

Description: Department of Engineering Hydrology, National University of Ireland, Galway, Ireland. In regional flood frequency estimation, a homogeneous pooling group of sites leads to a reduction in the error of quantile estimators which is the main aim of a regional flood frequency analysis. Examination of the homogeneity of regions/pooling groups is usually based on a statistic that relates to the formulation of a frequency distribution model, e.g. the coefficient...

Burn, D. H.: Evaluation of regional flood frequency-analysis with a region of influence approach, Water Resour. Res., 26, 2257–2265, 1990.; Castellarin, A., Burn, D. H., and Brath, A.: Assessing the effectiveness of hydrological similarity measures for flood frequency analysis, J. Hydrol., 241, 270–285, 2001.; Chowdhury, J. U., Stedinger, J. R., and Lu, L. H.: Goodness-of-fit tests for regional generalized extreme value flood distributions, Water Resour. Res., 27, 1765–1...

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Robust Global Sensitivity Analysis of a River Management Model : V...

By: T. Smith; G. M. Podger; T. Pickett; S. M. Cuddy; L. J. M. Peeters; R. Bark

Description: CSIRO Land and Water, Water for a Healthy Country Flagship, Adelaide, Australia. The simulation of routing and distribution of water through a regulated river system with a river management model will quickly results in complex and non-linear model behaviour. A robust sensitivity analysis increases the transparency of the model and provide both the modeller and the system manager with better understanding and insight on how the model simulates reality a...

Bark, R., Peeters, L., Lester, R., Pollino, C., Crossman, N., and Kandulu, J.: Understanding the sources of uncertainty to reduce the risks of undesirable outcomes in large-scale freshwater ecosystem restoration projects: an example from the Murray–Darling Basin, Australia, Environ. Sci. Policy, 33, 97–108, doi:10.1016/j.envsci.2013.04.010, 2013.; Borgonovo, E., Castaings, W., and Tarantola, S.: Moment independen...

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Eco-environmentally Friendly Operational Regulation: an Effective ...

By: X. Shen; R. Liang; R. Li; J. Feng

Description: State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, No. 24 of South Section One, Yihuang Road, Chengdu, 610065, China. The presence of elevated total dissolved gas (TDG) downstream of a spillway may result in an increased incidence of gas bubble disease in fish. Supersaturated TDG is transported and dissipated more slowly in reservoirs than in natural rivers because of a higher water depth and lower turbulence and thus ...

Bentley, W. W., Dawley, E. M., and Newcomb, T. W.: Some effects of excess dissolved gas on squawfish, Ptychocheilus oregonensis (Richardson), Technical Information Center, Oak Ridge, Tennessee, 41–46, 1976.; Cai, Y. P., Huang, G. H., Yang, Z. F., and Tan, Q.: Identification of optimal strategies for energy management systems planning under multiple uncertainties, Appl. Energ., 86, 480–495, 2009.; Cai, Y. P., Huang, G. H., Tan, Q., and Chen, B.: Identification of optimal ...

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Daily Reservoir Inflow Forecasting Combining Qpf Into Anns Model :...

By: Sheng-li Liao; Xin-yu Wu; Chun-tian Cheng; Jun Zhang; Jian-jian Shen

Description: Dept. of Civil & Hydraulic Engineering, Dalian Univ. of Technology, Dalian 116024, China. Daily reservoir inflow predictions with lead-times of several days are essential to the operational planning and scheduling of hydroelectric power system. The demand for quantitative precipitation forecasting (QPF) is increasing in hydropower operation with the dramatic advances in the numerical weather prediction (NWP) models. This paper presents a simple and an ef...

ASCE Task Committee: Artificial neural networks in hydrology. II: Hydrologic applications, J. Hydrol. Eng., 5, 124–137, 2000.; Aqil,~M., Kita,~I., Yano,~A., and Nishiyama,~S.: A~comparative study of artificial neural networks and neuro-fuzzy in continuous modeling of the daily and hourly behaviour of runoff, J. Hydrol., 337, 22–34, 2007.; Atiya,~A F., El-Shoura,~S M., Shaheen,~S I., and El-Sherif,~M S.: A~comparison between neural-network forecasting techniques – case st...

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Infrastructure Sufficiency in Meeting Water Demand Under Climate-i...

By: C. A. Scott; E. A. Lima; S. M. G. L. Montenegro; A. Ribeiro Neto; J. A. Cirilo

Description: Department of Civil Engineering, Federal University of Pernambuco, Recife, Brazil. Water availability for a range of human uses will increasingly be affected by climate change especially in the arid and semi-arid tropics. This paper aims to evaluate the ability of reservoirs and related infrastructure to meet targets for water supply in the Capibaribe River Basin (CRB), in the state of Pernambuco, Brazil. The basin has experienced spatial and sectoral ...

Akhtar, M., Ahmad, N., and Booij, M. J.: Use of regional climate model simulations as input for hydrological models for the Hindukush-Karakorum-Himalaya region, Hydrol. Earth Syst. Sci., 13, 1075–1089, doi:10.5194/hess-13-1075-2009, 2009.; Bates, B. C., Kundzewicz, Z. W., Wu, S., and Palutikof, J.: Climate Change and Water, Technical Paper of the Intergovernmental Panel on Climate Change, IPCC Secretariat, Geneva, 2...

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Transferring the Concept of Minimum Energy Expenditure from River ...

By: S. Birk; S. Hergarten; G. Winker

Description: Institut für Geo- und Umweltnaturwissenschaften, Albertstr. 23B, 79104 Freiburg, Germany. Principles of optimality provide an interesting alternative to modeling hydrological processes in detail on small scales. However, the concepts still seem to be on a visionary level except for the theory of minimum energy expenditure for river networks. Inspired by this approach, we present a theory of minimum energy expenditure in subsurface flow in order to obta...

Birk, S. and Hergarten, S.: Estimation of aquifer parameters from the recession of spring hydrographs – influence of flow geometry, Geophys. Res. Abstr., 14, EGU2012-9777, 2012.; Carman, P. C.: Fluid flow through granular beds, T. I. Chem. Eng.-Lond., 15, 150–166, 1937.; Dreybrodt, W., Gabrovšek, F., and Romanov, D.: Processes of speleogenesis: a modeling approach, in: Carsologica, vol. 4, ZRC Publishing, Ljubljana, 2005.; Gabrovšek, F. and Dreybrodt, W.: Spreading of tr...

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Examples of the Effects of Different Averaging Methods on Carbon D...

By: A. D. Culf

Description: Institute of Hydrology, Wallingford, Oxfordshire, OX10 8BB, United Kingdom. Three hours of high frequency vertical windspeed and carbon dioxide concentration data recorded over tropical forest in Brazil are presented and discussed in relation to various detrending techniques used in eddy correlation analysis. Running means with time constants 100, 1000 and 1875s and a 30 minute linear detrend, as commonly used to determine fluxes, have been calculated f...

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Physical Models for Class-room Teaching in Hydrology : Volume 9, I...

By: A. Rodhe

Description: Department of Earth Sciences, Air, Water and Landscape Science, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden. Hydrology teaching benefits from the fact that many important processes can be illustrated and explained with simple physical models. A set of mobile physical models has been developed and used during many years of lecturing at basic university level teaching in hydrology. One model, with which many phenomena can be demonstrated, con...

Beall, H.: Report on the WPI Conference Demonstrations as a teaching tool in chemistry: Pro and con, Journal of Chemical Education, 73, 641–642, 1996.; Crouch, C. H., Fagen, A. P., Callan, J. P., and Mazur, E.: Classroom demonstrations: Learning tools or entertainment?, Am. J. Phys., 72, 835–838, 2004.; Corbett, E. S., Sopper, W., and Lynch, J. A.: Watershed response to partial area applications of simulated rainfall, The hydrological characteristics of river basins/Les ...

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Analysis of Projected Hydrological Behavior of Catchments Based on...

By: O. Gutjahr; G. Grigoryan; O. Gronz; R. Ley; A. Rock; G. Heinemann; M. C. Casper

Description: University of Trier, Physical Geography, 54286 Trier, Germany. To precisely map the changes in hydrologic response of catchments (e.g. water balance, reactivity or extremes), we need sensitive and interpretable indicators. In this study we defined nine hydrologically meaningful signature indices: five indices were sampled on the flow duration curve, four indices were closely linked to the distribution of event runoff coefficients. We applied these signa...

Arnell, N. W.: Uncertainty in the relationship between climate forcing and hydrological response in UK catchments, Hydrol. Earth Syst. Sci., 15, 897–912, doi:10.5194/hess-15-897-2011, 2011.; Benoit, R., Pellerin, P., Kouwen, N., Ritchie, H., Donaldson N., Joe, P., and Soulis, E.: Towards the use of coupled atmospheric and hydrologic models at regional scale, Mon. Weather Rev., 128, 1681–1706, 2000.; Berg, M., Wieland...

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On the Nature of Rainfall Intermittency as Revealed by Different M...

By: M. Hellies; R. Deidda; G. Mascaro

Description: Universitá di Cagliari, Dipartimento di Ingegneria Civile, Ambientale e Architettura, Cagliari, Italy. A general consensus on the concept of rainfall intermittency has not yet been reached and intermittency is often referred to different aspects of rainfall variability, including the fragmentation of the wet-dry rainfall support, the strength of intensity fluctuations and of rainfall bursts, and sometimes also to the memory/correlation of the process. To...

Badas, M. G., Deidda, R., and Piga, E.: Modulation of homogeneous space-time rainfall cascades to account for orographic influences, Nat. Hazards Earth Syst. Sci., 6, 427–437, doi:10.5194/nhess-6-427-2006, 2006.; Bershadskii, A. J. N., Praskovsky, A., and Sreenivasan, K.: Clusterization and intermittency of temperature fluctuations in turbulent convection, Phys. Rev. E, 69, 056314,

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Variability of Low Flow Magnitudes in the Upper Colorado River Bas...

By: I. Pal; M. Pournasiri Poshtiri

Description: College of Engineering and Applied Sciences, Department of Civil Engineering, University of Colorado Denver, 1200 Larimer Street, Campus Box 116, Denver CO 80204, USA. Low flow magnitude in a head water basin is important for planners because minimum available amount of water in a given time period often leads to concerns regarding serious repercussions, in both up and downstream regions. This is a common scenario in arid region like Colorado River b...

Dai, A.: The influence of the inter-decadal Pacific Oscillation on US precipitation during 1923–2010, Clim. Dynam., 41, 633–646, doi:10.1007/s00382-012-1446-5, 2013.; Ellis, A. W., Goodrich, G. B., and Garfin, G.: A hydroclimatic index for examining patterns of drought in the Colorado River Basin, Int. J. Climatol., 30, 236–255, doi:10.1002/joc.1882, 2010.; Hidalgo, H. ...

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Corrigendum to Partitioning of Evaporation Into Transpiration, Soi...

By: S. Uhlenbrook; J. Wenninger; A. M. J. Coenders-gerrits; S. J. Sutanto

Description: UNESCO-IHE, Department of Water Engineering, P.O. Box 3015, 2601 DA, Delft, The Netherlands. No abstract available.

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