Development and application of the modelling system J2000-S for the EU-water framework directive

Abstract

Abstract. The scientific sound definition of measures to achieve the goals of the EU water framework directive (WFD) acquires spatially distributed analyses of the water and substance dynamics in meso- to macro-scale catchments. For this purpose, modelling tools or systems are needed which are robust and fast enough to be applied on such scales, but which are also able to simulate the impact of changes on single fields or small areas of a specific land use in the catchment. To face these challenges, we combined the fully-distributed hydrological model J2000 with the nitrogen transport routines of the Soil Water Assessment Tool SWAT model, which are normally applied in a semi-distributive approach. With this combination, we could extend the quantitative focus of J2000 with qualitative processes and could overcome the semi-distributed limitation of SWAT. For the implementation and combination of the components, we used the Jena Adaptable Modelling System JAMS (Kralisch and Krause, 2006) which helped tremendously in the relatively rapid and easy development of the new resultant model J2000-S (J2000-Substance). The modelling system was applied in the upper Gera watershed, located in Thuringia, Germany. The catchment has an area of 844 km2 and includes three of the typical landscape forms of Thuringia. The application showed, that the new modelling system was able to reproduce the daily hydrological as well as the nitrogen dynamics with a sufficient quality. The paper will describe the results of the new model and compare them with the results obtained with the original semi-distributed application of SWAT.

Quantifying human impacts on hydrological drought using a combined modelling approach in a tropical river basin in central Vietnam

“…The J2000 is a physically based distributed and processoriented model, which is suitable for simulating the hydrological processes of meso-and macro-scale catchments (Kralisch and Fink et al, 2007). The model describes the hydrological processes as encapsulated or independent process modules.…”

Assessing the Impact of Land-Use Changes on Providing Hydrological Ecosystem Functions (ESF) and Services (ESS) – A Case-Study Experience Based Conceptual Framework

“…Referring to our intention to embed hydrological ESF and ESS better in a regional context, especially the concept of HRU provides a well-tested spatial reference. HRU were successfully applied in distributed river basin models such as JAMS/J2000 (Krause and Flügel 2005 ;Krause et al 2006 ;Fink et al 2007 ;Nepal et al 2012 ) and support the integration of micro-scale (land-use and management) and meso-scale aspects (catchment, region, administrative districts).…”

“…2 by physically based mathematical equations and empirical parameterization for each HRU. JAMS/J2000 quantifi es the distributed Assessing the Impact of Land-Use Changes on Providing Hydrological Ecosystem… regeneration dynamics of subsurface and surface water resources at catchment scale and supports a scenario based impact analysis for LULCC impact on ESF and ESS Fink et al 2007 ;Nepal et al 2012 ). JAMS/J2000 is meanwhile a component of the Integrated Land-management System (ILMS) platform ; Fig.…”

Hydrological modeling of the Ribeirão das Posses – An assessment based on the Agricultural Ecosystem Services (AgES) watershed model

“…AgES is a spatially distributed watershed model (Ascough et al, 2015a) with the main components taken primarily from the J2000 (Krause et al, 2006) and J2000-SN models (Fink et al, 2007) and has been applied to cropping systems in Colorado and the Midwest USA (Ascough et al, 2015a). The AgES model explicitly simulates the hydrologic and agronomic responses from spatially distributed land use, management, and weather conditions across inter-connected land units.…”