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1、TheExtentofLandUseImpactonWaterRegimeintheVseminkaCatchmentPavelKovarandDarinaVassovaFacultyofEnvironmentalSciences,CzechUniversityofLifeSciences,Prague16521,CzechRepublicReceived:July1,2011/Accepted:August26,2011/Published:February20,2012.Abstract:Thepaperd
2、ealswiththeimpactoflandusechangesonwaterregime.AnassessmentwascarriedoutinordertodeterminetheextenttowhichthemaincomponentsofthewaterbalanceontheexperimentalcatchmentVseminkahavebeeninfluencedbylandusechanges(regionVsetinskeHills,theCzechRepublic).Forthisrea
3、son,thewaterbalancemodelWBCM-5wasimplementedfortheperiodof30yearsinadailystep,withparticularfocusonthesimulationofthecomponentsofdirectrunoffandofsubsurfacewaterrecharge.Intheselectedyearsoftheperiod1980-2009,major23changesweremadeinlanduseandsignificantfluc
4、tuationofrainfall-runoffregimeswereobserved(e.g.dryyear1992,floodyear1997andnormalyear2009).AfterWBCM-5parametercalibrationitwasobservedthatsomewaterbalancecomponentscanchangeinrelationtosubstantiallandusechanges,evenuptodozensofpercentinabalance-considerati
5、on,i.e.indaily,monthlyandyearlyordecadalvalues,specificallyasfarasthecomponentsofinterceptionandalsoofdirectrunoffandofsubsurfacewaterrechargeareconcerned.However,adifferentsituationappearedduringtheinvestigationofsignificantshort-termrainfall-runoffprocesse
6、s.TherewereaboutsevenrealfloodeventsduringthesameperiodonthesamecatchmentwhichwereanalysedusingtheKINFIL-2model(timestep0.5hr).Landusechange,positiveornegativescenarios,werealsoanalysedduringthisperiod.Asopposedtolong-termwaterbalanceanalyses,onlya10%differe
7、nceinthehydrographpeakandvolumewasobserved.Insummary,theauthorshaveshownthatitisalwaysimportant23todistinguishapossiblelandusechangeimpactoneitherlong-termbalanceorshort-termrunoff.Otherwise,asoftenfoundinoversimplifiedcommentariesonfloodeventsinthemassmedia
8、,theactualimpactoflandusechangesonwaterregimemaybemisunderstood.Keywords:Landusechange,waterbalance,rainfall-runoffevent,hydrologicalmodel.1.Introduction??Howisthewaterregimeinfluencedbylandusec
