<?xml version="1.0" encoding="utf-8" standalone="no"?>
<!DOCTYPE article SYSTEM "http://www.hydrol-earth-syst-sci.net/inc/hess/copernicus.dtd">
<article language="en">
	<journal>
		<journal_title>Hydrology and Earth System Sciences</journal_title>
		<journal_url>www.hydrol-earth-syst-sci.net</journal_url>
		<issn>1027-5606</issn>
		<eissn>1607-7938</eissn>
		<volume_number>13</volume_number>
		<issue_number>11</issue_number>
		<publication_year>2009</publication_year>
	</journal>
	<doi>10.5194/hess-13-2069-2009</doi>
	<article_url>http://www.hydrol-earth-syst-sci.net/13/2069/2009/</article_url>
	<abstract_html>http://www.hydrol-earth-syst-sci.net/13/2069/2009/hess-13-2069-2009.html</abstract_html>
	<fulltext_pdf>http://www.hydrol-earth-syst-sci.net/13/2069/2009/hess-13-2069-2009.pdf</fulltext_pdf>
	<start_page>2069</start_page>
	<end_page>2094</end_page>
	<publication_date>2009-11-04</publication_date>
	<article_title content_type="html">Comparative predictions of discharge from an artificial catchment (Chicken Creek) using sparse data</article_title>
	<authors>
		<author numeration="1" affiliations="1">
			<name>H. M. HollÃ¤nder</name>
			<email>hartmut.hollaender@tu-cottbus.de</email>
		</author>
		<author numeration="2" affiliations="2">
			<name>T. Blume</name>
		</author>
		<author numeration="3" affiliations="3">
			<name>H. Bormann</name>
		</author>
		<author numeration="4" affiliations="4,13">
			<name>W. Buytaert</name>
		</author>
		<author numeration="5" affiliations="5">
			<name>G.B. Chirico</name>
		</author>
		<author numeration="6" affiliations="6">
			<name>J.-F. Exbrayat</name>
		</author>
		<author numeration="7" affiliations="7">
			<name>D. Gustafsson</name>
		</author>
		<author numeration="8" affiliations="8">
			<name>H. HÃ¶lzel</name>
		</author>
		<author numeration="9" affiliations="6">
			<name>P. Kraft</name>
		</author>
		<author numeration="10" affiliations="9">
			<name>C. Stamm</name>
		</author>
		<author numeration="11" affiliations="10">
			<name>S. Stoll</name>
		</author>
		<author numeration="12" affiliations="11">
			<name>G. BlÃ¶schl</name>
		</author>
		<author numeration="13" affiliations="12">
			<name>H. FlÃ¼hler</name>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Chair of Hydrology and Water Resources Management, Brandenburg University of Technology Cottbus, 03046 Cottbus, Germany</affiliation>
		<affiliation numeration="2" content_type="html">Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, C4 2.25, 14473 Potsdam, Germany</affiliation>
		<affiliation numeration="3" content_type="html">Department of Biology and Environmental Sciences, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany</affiliation>
		<affiliation numeration="4" content_type="html">School of Geographical Sciences, University of Bristol, BS8 1SS, UK</affiliation>
		<affiliation numeration="5" content_type="html">Dipartimento di ingegneria agraria e agronomia del territorio, UniversitÃ  di Napoli Federico II, 80055 Naples, Italy</affiliation>
		<affiliation numeration="6" content_type="html">Institute for Landscape Ecology and Resources Management, University of Giessen, 35392 Giessen, Germany</affiliation>
		<affiliation numeration="7" content_type="html">Department of Land and Water Resources Engineering, Royal Institute of Technology KTH, 10044 Stockholm, Sweden</affiliation>
		<affiliation numeration="8" content_type="html">Department of Geography, University of Bonn, 53113 Bonn, Germany</affiliation>
		<affiliation numeration="9" content_type="html">Department Environmental Chemistry, Eawag, 8600 DÃ¼bendorf, Switzerland</affiliation>
		<affiliation numeration="10" content_type="html">Institute of Environmental Engineering, ETH Zurich 8093 ZÃ¼rich, Switzerland</affiliation>
		<affiliation numeration="11" content_type="html">Institute of Hydraulic Engineering and Water Resources Management, TU Vienna, 1040 Vienna, Austria</affiliation>
		<affiliation numeration="12" content_type="html">Department of Environmental Sciences, ETH Zurich, 8092 ZÃ¼rich, Switzerland</affiliation>
		<affiliation numeration="13" content_type="html">now at: Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK</affiliation>
	</affiliations>
	<abstract content_type="html">Ten conceptually different models in predicting discharge from the
artificial Chicken Creek catchment in North-East Germany were used
for this study. Soil texture and topography data were given to the
modellers, but discharge data was withheld. We compare the
predictions with the measurements from the 6 ha catchment and
discuss the conceptualization and parameterization of the models.
The predictions vary in a wide range, e.g. with the predicted
actual evapotranspiration ranging from 88 to 579 mm/y and the
discharge from 19 to 346 mm/y. The predicted components of the
hydrological cycle deviated systematically from the observations,
which were not known to the modellers. Discharge was mainly
predicted as subsurface discharge with little direct runoff. In
reality, surface runoff was a major flow component despite the
fairly coarse soil texture. The actual evapotranspiration (AET) and
the ratio between actual and potential ET was systematically
overestimated by nine of the ten models. None of the model
simulations came even close to the observed water balance for the
entire 3-year study period. The comparison indicates that the
personal judgement of the modellers was a major source of the
differences between the model results. The most important parameters
to be presumed were the soil parameters and the initial soil-water
content while plant parameterization had, in this particular case of
sparse vegetation, only a minor influence on the results.</abstract>
	<references>
		<reference numeration="1" content_type="text"> Adhoc AG Boden: Bodenkundliche Kartieranleitung, 5th edn., Hannover, Germany, 438 p., 2005. </reference>
		<reference numeration="2" content_type="text"> AG Boden: Bodenkundliche Kartieranleitung, 4th edn., Hannover, Germany, 392 p., 1994. </reference>
		<reference numeration="3" content_type="text"> Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop evapotranspiration. Guidelines for computing crop water requirements, Irrigation and Drainage Paper, FAO, Rome, 300~pp., 1998. </reference>
		<reference numeration="4" content_type="text"> AlvenÃ¤s, G. and Jansson, P.-E.: Model for evaporation, moisture and temperature of bare soil: calibration and sensitivity analysis, Agric. For. Met., 88, 47â€“56, 1997. </reference>
		<reference numeration="5" content_type="text"> Arnold, J. G., Srinivasan, R., Muttiah, R. S., and Williams, J. R.: Large area hydrologic modelling and assessment part I: model development, J. Am. Water Resour. Assoc., 34, 73â€“89, 1998. </reference>
		<reference numeration="6" content_type="text"> Barbour, S. L., Boese, C., and Stolte, B.: Water balance for reclamation covers on oil sands mining overburden piles, Canadian Geotechnical Conference, 313â€“319, 2001. </reference>
		<reference numeration="7" content_type="text"> Beven, K.: Changing ideas in hydrology â€“ The case of physically-based models, J. Hydrol., 105, 157â€“172, 1989. </reference>
		<reference numeration="8" content_type="text"> Beven, K., Lamb, R., Quinn, P., Romanowicz, R., and Freer, J.: Topmodel, in: Computer Models of Watershed Hydrology, Colorado, USA, 627â€“668, 1995. </reference>
		<reference numeration="9" content_type="text"> Beven, K. J. and Kirkby, M. J.: A physically based variable contributing area model of basin hydrology, Hydrol. Sci. Bull., 24, 43â€“69, 1979. </reference>
		<reference numeration="10" content_type="text"> Beven, K. J.: Rainfall-runoff modelling: The Primer, John Wiley &amp; Sons, Chichister, 372 pp., 2001. </reference>
		<reference numeration="11" content_type="text"> Black, T. A., Gardner, W. R., and Thurtell, G. W.: The prediction of evaporation, drainage and soil-water storage for a bare soil., Soil Sci. Soc. Amer. Proc., 33, 655â€“660, 1969. </reference>
		<reference numeration="12" content_type="text"> BlÃ¶schl, G.: Rainfall-runoff modelling of ungauged catchments, article 133, in: Encyclopedia of Hydrological Sciences, edited by: Anderson, M. G., John Wiley &amp; Sons, Chichester, 2061â€“2080, 2005. </reference>
		<reference numeration="13" content_type="text"> Bormann, H.: Hochskalieren von prozessorientierten Wassertransportmodellen â€“ Methoden und Grenzen, Reihe Geowissenschaften, Herbert-Utz-Verlag â€“ Wissenschaft MÃ¼nchen, 164~pp., 2001. </reference>
		<reference numeration="14" content_type="text"> Bormann, H.: Sensitivity of a regionally applied soil vegetation atmosphere scheme to input data resolution and data classification, J. Hydrol., 351, 154â€“169, 2008. </reference>
		<reference numeration="15" content_type="text"> Bronstert, A., BÃ¡rdossy, A., Bismuth, C., Buiteveld, H., Disse, M., Engel, H., Fritsch, U., Hundecha, Y., Lammersen, R., Niehoff, D., and Ritter, N.: Multi-scale modelling of land-use change and river training effects on floods in the Rhine basin, 2007. </reference>
		<reference numeration="16" content_type="text"> Brooks, R. H. and Corey, A. T.: Hydraulic properties of porous media, Colorado State University, Fort Collins, Colorado, 27~pp., 1964. </reference>
		<reference numeration="17" content_type="text"> Carsel, R. F. and Parrish, R. S.: Developing Joint Probability Distributions of soil-water Retention Characteristics, Water Resour. Res., 24, 755â€“769, 1988. </reference>
		<reference numeration="18" content_type="text"> Chirico, G. B., Grayson, R. B., and Western, A. W.: On the computation of the quasi-dynamic wetness index with multiple-flow-direction algorithms, Water Resour. Res., 39, 1115, doi:10.1029/2002WR001754, 2003. </reference>
		<reference numeration="19" content_type="text"> Choi, H. T. and Beven, K.: Multi-period and multi-criteria model conditioning to reduce prediction uncertainty in an application of topmodel within the glue framework, J. Hydrol., 332, 316â€“336, 2007. </reference>
		<reference numeration="20" content_type="text"> DiekkrÃ¼ger, B. and Arning, M.: Simulation of water fluxes using different methods for estimating soil parameters, Ecol. Model., 81, 83â€“95, 1995. </reference>
		<reference numeration="21" content_type="text"> DVWK: Ermittlung der Verdunstung von Land- und WasserflÃ¤chen, MerkblÃ¤tter, Kommissionsbetrieb Wirtschafts- und Verlagswesen Gas und Wasser mbH, Bonn, 135~pp., 1996. </reference>
		<reference numeration="22" content_type="text"> Feddes, R. A., Kowalik, P. J., and Zaradny, H.: Simulation of field water use and crop yield, in: Simulations Monograph, Pudoc, Wageningen, 188 pp., 1978. </reference>
		<reference numeration="23" content_type="text"> Fenicia, F., McDonnell, J. J., and Savenije, H. H. G.: Learning from model improvement: On the contribution of complementary data to process understanding, Water Resour. Res., 44, W06419, doi:10.1029/2007WR006386, 2008. </reference>
		<reference numeration="24" content_type="text"> Freeze, R. A. and Cherry, J. A.: Groundwater, Prentice-Hall, Englewood Cliffs, NJ, 604~pp., 1979. </reference>
		<reference numeration="25" content_type="text"> Gallart, F., Latron, J., Llorens, P., and Beven, K.: Using internal catchment information to reduce the uncertainty of discharge and baseflow predictions, Adv. Water Resour., 30, 808â€“823, 2007. </reference>
		<reference numeration="26" content_type="text"> Gassmann, P. W., Reyes, M. R., Green, C. H., and Arnold, J. G.: The soil and water assessment tool: historical development, applications and future research directions, T. ASAE, 50, 1211â€“1250, 2007. </reference>
		<reference numeration="27" content_type="text"> Gerwin, W., Raab, T., Biemelt, D., Bens, O., and HÃ¼ttl, R. F.: The artificial water catchment &quot;Chicken Creek&quot; as an observatory for critical zone processes and structures, Hydrol. Earth Syst. Sci. Discuss., 6, 1769â€“1795, 2009. </reference>
		<reference numeration="28" content_type="text"> Giertz, S., DiekkrÃ¼ger, B., and Steup, G.: Physically-based modelling of hydrological processes in a tropical headwater catchment (West Africa) â€“ process representation and multi-criteria validation, Hydrol. Earth Syst. Sci., 10, 829â€“847, 2006. </reference>
		<reference numeration="29" content_type="text"> Goodrich, D. C.: Geometric simplification of a distributed rainfall-runoff model over a range of basin scales, Ph.D. Thesis, The University of Arizona, 361~pp., 1990. </reference>
		<reference numeration="30" content_type="text"> Grayson, R. B. and BlÃ¶schl, G.: Spatial Patterns in Catchment Hydrology: Observations and Modelling, Cambridge University Press, Cambridge, UK, 404~pp., 2000a. </reference>
		<reference numeration="31" content_type="text"> Grayson, R. B. and BlÃ¶schl, G.: Summary of pattern recognition and concluding remarks, in: Spatial Patterns in Catchment Hydrology, edited by: Grayson, R. B. and BlÃ¶schl, G., Cambridge University Press, Cambridge,UK, 355â€“367, 2000b. </reference>
		<reference numeration="32" content_type="text"> Gu, W.-Z. and Freer, J.: Patterns of surface and subsurface runoff generation, IAHS Publications, 229, 265â€“273, 1995. </reference>
		<reference numeration="33" content_type="text"> Gustafsson, D., StÃ¤hli, M., and Jansson, P.-E.: The surface energy balance of a snow cover: comparing measurements to two different simulation models, Theor. Appl. Climatol., 70, 81â€“96, 2001. </reference>
		<reference numeration="34" content_type="text"> Hansen, D. P., Jakeman, A. J., Kendall, C., and Gu, W.-Z.: Identification of internal flow dynamics in two experimental catchments, Math. Comput. Simulat., 43, 367â€“375, 1997. </reference>
		<reference numeration="35" content_type="text"> Hargreaves, G. L., Hargreaves, G. H., and Riley, J. P.: Agricultural benefits for Senegal River Basin, J. Irrig. and Drain. Engr., 111, 113â€“124, 1985. </reference>
		<reference numeration="36" content_type="text"> Healy, R. W. and Cook, P. G.: Using groundwater levels to estimate recharge, Hydrogeol. J., 10, 91â€“109, 2002. </reference>
		<reference numeration="37" content_type="text"> HÃ¶lzel, H. and DiekkrÃ¼ger, B.: Hydrological analyses as a prerequisite for soil erosion modeling â€“ Landscape related studies in a mesoscale hydrological catchment, in: Landform â€“ structure, evolution, process control, International Symposium on Landform, in press, 2008. </reference>
		<reference numeration="38" content_type="text"> Hooghoudt, S. B.: Bijdragen tot de kennis van enige natuurkundige grootheden van de ground, Versl. Landb. Onderz, 42, 449â€“541, 1940. </reference>
		<reference numeration="39" content_type="text"> Jansson, P.-E. and Halldin, S.: Model for the annual water and energy flow in a layered soil, Comparison of Forest and Energy Exchange Models, Copenhagen, 145â€“163, 1979. </reference>
		<reference numeration="40" content_type="text"> Jansson, P.-E. and Moon, D. S.: A coupled model of water, heat and mass transfer using object orientation to improve flexibility and functionality, Environ. Modell. Softw., 16, 37â€“46, 2001. </reference>
		<reference numeration="41" content_type="text"> Jasper, K.: Hydrological Modelling of Alpine River Catchments using Output Variables from Atmospheric Models, ETH Zurich, 138~pp., 2005. </reference>
		<reference numeration="42" content_type="text"> Kendall, C., Mc Donnell, J. J., and Gu, W.-Z.: A look inside &quot;black box&quot; hydrograph seperation models: a study at the Hydrohill catchment, Hydrol. Process., 15(10), 1877â€“1902, 2001.  </reference>
		<reference numeration="43" content_type="text"> Kraft, P., VachÃ©, K. B., Breuer, L., and Frede, H.-G.: A solute and water flux library for catchment models, Proceedings of the iEMSs Fourth Biennial Meeting: International Congress on Environmental Modelling and Software Barcelona, 2008. </reference>
		<reference numeration="44" content_type="text"> Kroes, J. G., van Dam, J. C., Groenendijk, P., Hendriks, R. F. A., and Jacobs, C. M. J.: SWAP version 3.2., Theory description and user manual, Alterra, Wageningen, 262 pp., 2008. </reference>
		<reference numeration="45" content_type="text"> Lindenmaier, F., Zehe, E., Dittfurth, A., and Ihringer, J.: Process identification at a slowmoving landslide in the Vorarlberg Alps, Hydrol. Process., 19, 1635â€“1651, 2005. </reference>
		<reference numeration="46" content_type="text"> Lohammar, T., Larsson, S., Linder, S., and Falk, S. O.: FAST â€“ simulation medels of gaseous exchange in Scots pine, in: Structure and Function of Northern Coniferous Forests â€“ An Ecosystem Study, edited by: Persson, T., Ecological Bullentins Stockholm, 505â€“523, 1980. </reference>
		<reference numeration="47" content_type="text"> Lundmark, A. and Jansson, P.-E.: Generic soil descriptions for modelling water and chloride dynamics in the unsaturated zone based on Swedish soils, Geoderma, 150, 85â€“95, 2009. </reference>
		<reference numeration="48" content_type="text"> Maurer, T.: Physikalisch begrÃ¼ndetete, zeitkontinuierliche Modellierung des Wassertransports in kleinen lÃ¤ndlichenen Einzugsgebieten, UniversitÃ¤t Karlsruhe, 1997. </reference>
		<reference numeration="49" content_type="text"> Meinzer, O. E.: The occurrence of groundwater in the United States with a discussion of principles, US Geol. Surv. Water-SupplyPaper, 489, 321 pp., 1923. </reference>
		<reference numeration="50" content_type="text"> Monteith, J. L.: Evaporation and environment, in: The Company of Biologists, The State and Movement of Water in Living Organisms, 19th Symp. Soc. Exp. Biol., Cambridge, UK, 205â€“234, 1965. </reference>
		<reference numeration="51" content_type="text"> Monteith, J. L. and Unsworth, M. H.: Principles of environmental physics, edited by: Arnold, S. E., London, UK, 291 pp., 1990. </reference>
		<reference numeration="52" content_type="text"> Mualem, Y.: A new model for predicting the hydraulic conductivity of unsaturated porous media, Water Resour. Res., 12, 513â€“522, 1976. </reference>
		<reference numeration="53" content_type="text"> Naef, F.: Can we model the rainfall-runoff today? Hydrological Sciences Bulletin, 26, 281â€“289, 1981. </reference>
		<reference numeration="54" content_type="text"> Nenov, R.: Determination of the evapotranspiration from the artificial catchment HÃ¼hnerwasser, Chair of Hydrology and Water Management, Brandenburg University of Technology, Cottbus, 100 pp., 2009. </reference>
		<reference numeration="55" content_type="text"> Nicolau, J.: Runoff generation and routing on artificial slopes in a Mediterranean continental environment, Hydrol. Process., 16, 631â€“647, 2002. </reference>
		<reference numeration="56" content_type="text"> Niehoff, D., Fritsch, U., and Bronstert, A.: Land-use impacts on storm-runoff generation: scenarios of land-use change and simulation of hydrological response in a meso-scale catchment in SW-Germany, J. Hydrol., 267, 80â€“93, 2002. </reference>
		<reference numeration="57" content_type="text"> Oudin, L., AndrÃ©assian, V., Perrin, C., Michel, C., and Le Moine, N.: Spatial proximity, physical similarity, regression and ungaged catchments: A comparison of regionalization approaches based on 913 French catchments, Water Resour. Res., 44, W03413, doi:10.1029/2007WR006240, 2008. </reference>
		<reference numeration="58" content_type="text"> Parajka J., Merz, R., and BlÃ¶schl, G.: A comparison of regionalisation methods for catchment model parameters, Hydrol. Earth Syst. Sc., 9, 157â€“171, 2005. </reference>
		<reference numeration="59" content_type="text"> Penman, H. L.: Natural evaporation from open water, bare soil and grass. Proc. Roy. Meteorol. Soc. A, 193, 120â€“145, 1948. </reference>
		<reference numeration="60" content_type="text"> Peschke, G.: Moisture and Runoff Components from a Physically Founded Approach, Acta Hydrophys., 31, 191â€“205, 1987. </reference>
		<reference numeration="61" content_type="text">Plate, E. and Zehe, E.: Hydrologie und Stoffdynamik kleiner Einzugsgebiete: Prozesse und Modelle. Schweizerbart, 366 pp., 2008. </reference>
		<reference numeration="62" content_type="text"> Rawls, W. J. and Brakensiek, D. L.: Prediction of soil-water properties for hydrologic modeling, in: Proceedings of Symposium on Watershed Management, ASCE, 293â€“299, 1985. </reference>
		<reference numeration="63" content_type="text"> Richter, D.: Zur einheitlichen Berechnung der Wassertemperatur und der Verdunstung von freien Wasserflächen auf statistischer Grundlage, Abh. Meteor Dienst der DDR, 16, 35 pp., 1977. </reference>
		<reference numeration="64" content_type="text"> Ritchie, J. T.: A model for predicting evaporation from a row crop with incomplete cover, Water Resour. Res., 8, 1204â€“1213, 1972. </reference>
		<reference numeration="65" content_type="text"> Reed, S., Koren, V., Smith, M., Zhang, Z., Moreda, F., and Seo, D. J.: Overall distributed model intercomparison project results, J. Hydrol., 298, 27â€“60, 2004. </reference>
		<reference numeration="66" content_type="text"> Romano, N. and Santini, A.: Water retention and storage: Field, in: Methods of Soil Analysis, edited by: Topp, J. H. D. a. G. C., SSSA Book Series No 5, Madison, Wi, USA, 721â€“738, 2002. %</reference>
		<reference numeration="67" content_type="text"> %%Saeternbekken,\blackbox\bf initials?, and %Beven, K. J.: Rainfall-runoff modelling: the Primer, %Wiley-Interscience, Chichester, 372~pp., 2001. </reference>
		<reference numeration="68" content_type="text"> Saxton, K. E., Rawls, W., Romberger, J., and Papendick, R.: Estimating generalized soil-water characteristics from texture, 1031â€“1035, 1986. </reference>
		<reference numeration="69" content_type="text"> Schaap, M. G., Leij, F. J., and van Genuchten, M. T.: A computer program for estimating soil hydraulic parameters with hierarchical pedotransfer functions, J. Hydrol., 251, 163â€“176, 2001. </reference>
		<reference numeration="70" content_type="text"> Schulla, J. and Jasper, K.: Model Description WaSiM-ETH, ETH Zürich, Zürich, 181 pp., 2007. </reference>
		<reference numeration="71" content_type="text"> Seibert, J. and McDonnell, J. J.: On the dialog between experimentalist and modeler in catchment hydrology: Use of soft data for multicriteria model calibration, Water Resour. Res., 38(11), 1241, doi:10.1029/2001WR000978, 2002. </reference>
		<reference numeration="72" content_type="text"> Simunek, J., Sejna, M., and van Genuchten, M. T.: The HYDRUS2 Code for Simulating the Two-Dimensional Movement of Water, Heat, and Multiple Solute in Variably-Saturated Porous Media, edited by: Service, U. S. S. L. A. R., US Department of Agriculture, Riverside, California, USA, 251 pp., 1999. </reference>
		<reference numeration="73" content_type="text"> Sivapalan, M., Takeuchi, K., Franks, S., Gupta, V., Karambiri, H., Lakshmi, V., Liang, X., McDonnell, J., Mendiondo, E., O&apos;Connell, P., Oki, T., Pomeroy, J., Schertzer, D., Uhlenbrook, S., and Zehe, E.: IAHS decade on Predictions in Ungauged Basins (PUB), 2003â€“2012: Shaping an exciting future for the hydrological sciences, Hydrolog Sci. J., 48, 857â€“880, 2003. </reference>
		<reference numeration="74" content_type="text"> Smith, R. E. and Parlange, J. Y.: A parameter-efficient hydrologic infiltration model, Water Resour. Res., 14, 533â€“538, 1978. </reference>
		<reference numeration="75" content_type="text"> StÃ¤hli, M., Jansson, P.-E., and Lundin, L.-C.: Preferential water flow in a frozen soil â€“ a two-domain model approach, Hydrol. Process., 10, 1305â€“1316, 1996. </reference>
		<reference numeration="76" content_type="text"> StÃ¤hli, M. and Gustafsson, D.: Long-term investigations of the snow cover in a subalpine semi-forested catchment, Hydrol. Process., 20, 411â€“428, 2006. </reference>
		<reference numeration="77" content_type="text"> Turc, L.: Ã‰valuation des besoins en eau irrigation, l&apos;Ã©vapotranspiration potentielle, Ann. Agron, 12, 13â€“49, 1961. </reference>
		<reference numeration="78" content_type="text"> VachÃ©, K. and McDonnell, J. J.: A process-based rejectionist framework for evaluating catchment runoff model structure, Water Resour. Res., 42, W02409, doi:10.1029/2005WR004247, 2006. </reference>
		<reference numeration="79" content_type="text"> van Dam, J. C., Huygen, J., Wesseling, J. G., Feddes, R. A., Kabat, P., van Walsum, P. E. V., Groenendijk, P., and van Diepen, C. A.: Theory of SWAP version 2.0. Simulation of water flow, solute transport and plant growth in the Soil-Water-Atmosphere-Plant environment, Wageningen University, Wageningen, 165 pp., 1997. </reference>
		<reference numeration="80" content_type="text"> van Genuchten, M. T.: A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Sciences Society of America, 44, 892â€“898, 1980. </reference>
		<reference numeration="81" content_type="text"> Weiler, M. and McDonnell, J. J.: Virtual experiments: A new approach for improving process conceptualisation in hillslope hydrology, J. Hydrol, 285, 3â€“18, 2004. </reference>
		<reference numeration="82" content_type="text"> Weiler, M. and McDonnell, J. J.: Testing nutrient flushing hypotheses at the hillslope scale: A virtual experiment approach, J. Hydrol., 319, 339â€“356, 2006.  </reference>
		<reference numeration="83" content_type="text"> Weiler, M. and McDonnell, J. J.: Conceptualizing lateral preferential flow and flow networks and simulating the effects on gauged and ungauged hillslopes, Water Resour. Res., 43, W03403, doi:10.1029/2006WR004867, 2007. </reference>
		<reference numeration="84" content_type="text"> Wigmosta, M., Vail, L., and Lettenmaier, D. P.: Distributed hydrology-vegetation model for complex terrain, Water Resour. Res., 30, 1665â€“1679, 1994. </reference>
		<reference numeration="85" content_type="text"> Wigmosta, M. and Lettenmaier, D. P.: A comparison of simplified methods for routing topographically driven subsurface flow, Water Resour. Res., 35, 255â€“264, 1999. </reference>
		<reference numeration="86" content_type="text"> WÃ¶sten, J. H. M., Pachepsky, Y. A., and Rawls W. J.: Pedotransfer functions: bridging the gap between available basic soil data and missing soil hydraulic characteristics, J. Hydrol., 251, 123â€“150, 2001. </reference>
		<reference numeration="87" content_type="text"> Zehe, E. and FlÃ¼hler, H.: Preferential transport of isoproturon at a plot scale and a field scale tile-drained site, J. Hydrol., 247, 100â€“115, 2001a. </reference>
		<reference numeration="88" content_type="text"> Zehe, E. and FlÃ¼hler, H.: Slope scale variation of flow patterns in soil profiles, J. Hydrol., 247, 116â€“132, 2001b. </reference>
		<reference numeration="89" content_type="text"> Zehe, E. and Bloeschl, G.: Predictability of hydrologic response at the plot and catchment scales: Role of initial conditions, Water Resour. Res., 40, W10202, doi:10.1029/2003WR002869, 2004. </reference>
		<reference numeration="90" content_type="text"> Zehe, E., Becker, R., BÃ¡rdossy, A., and Plate, E.: Uncertainty of simulated catchment runoff response in the presence of threshold processes: Role of initial soil moisture and precipitation, J. Hydrol., 315, 183â€“202, 2005. </reference>
	</references>
</article>

