https://jams.uni-jena.de/ilmswiki/index.php?action=history&feed=atom&title=Hydrological_Model_J2000Hydrological Model J2000 - Revision history2026-07-24T16:11:47ZRevision history for this page on the wikiMediaWiki 1.17.0https://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=14829&oldid=prevNsk: /* Parameters */2019-07-18T19:10:38Z<p><span class="autocomment">Parameters</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|albedo || albedo in %</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|albedo || albedo in %</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>|RSC0_1 || minimum surface resistance <del class="diffchange diffchange-inline">for </del>water-saturated <del class="diffchange diffchange-inline">soil </del>in January  </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>|RSC0_1 || minimum surface resistance <ins class="diffchange diffchange-inline">under </ins>water-saturated <ins class="diffchange diffchange-inline">conditions </ins>in January  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|...</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|...</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>|RSC0_12 || minimum surface resistance <del class="diffchange diffchange-inline">for </del>water-saturated <del class="diffchange diffchange-inline">soil </del>in December</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>|RSC0_12 || minimum surface resistance <ins class="diffchange diffchange-inline">under </ins>water-saturated <ins class="diffchange diffchange-inline">conditions </ins>in December</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|LAI_d1 || leaf area index (LAI) at the beginning of the vegetation period  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|LAI_d1 || leaf area index (LAI) at the beginning of the vegetation period  </div></td></tr>
</table>Nskhttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13393&oldid=prevBjoern at 11:36, 11 November 20132013-11-11T11:36:02Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[de:Hydrologisches_Modell_J2000]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[de:Hydrologisches_Modell_J2000]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[pl:Model_hydrologiczny_J2000]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td></tr>
</table>Bjoernhttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13392&oldid=prevNsk at 10:03, 11 November 20132013-11-11T10:03:21Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">[[pl:Test_J2000]]</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td></tr>
</table>Nskhttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13391&oldid=prevNsk at 09:47, 11 November 20132013-11-11T09:47:13Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[pl:Test_J2000]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td></tr>
</table>Nskhttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13390&oldid=prevNsk at 09:39, 11 November 20132013-11-11T09:39:47Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">[[pl:Bla_J2000]]</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td></tr>
</table>Nskhttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13389&oldid=prevMarta at 08:04, 11 November 20132013-11-11T08:04:41Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[pt:Modelo_Hidrológico_J2000]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[pl:Bla_J2000]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td></tr>
</table>Martahttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13355&oldid=prevDanielS at 14:25, 18 May 20132013-05-18T14:25:14Z<p></p>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[pt:Modelo_Hidrológico_J2000]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The hydrologic model system J2000 offers a physical-based modeling of the water balance of big catchment areas. In addition to the simulation of hydrologic processes, which influence the runoff and its concentration in the upper meso- and macro scale, the modeling system contains routines that help to regionalize the punctual available climate values and precipitation values quite safely. Furthermore, the calculation of the real evaporation, with which the calculation is carried out area-differentiated in consideration of the evaporation patterns of different land use classes, is integrated into the model. Since the model shall be suitable for the modeling of big catchment areas of more than 1000 km², it is ensured that the modeling can be carried out by means of the available base data on the national scale.  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The simulation of the different hydrologic processes is carried out in program modules that are completed and as far as possible independent of each other. This offers to edit, substitute or add individual modules without the necessity to structure the entire model anew.  </div></td></tr>
</table>DanielShttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13354&oldid=prevDanielS at 14:22, 18 May 20132013-05-18T14:22:19Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* Caching: The results of some compute-intensive processes can be temporarily stored in hard disk and reused for further model runs. Therefore the model run is slightly faster. Attention: This feature is not completely safe yet and should only be applied by experienced users.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* Caching: The results of some compute-intensive processes can be temporarily stored in hard disk and reused for further model runs. Therefore the model run is slightly faster. Attention: This feature is not completely safe yet and should only be applied by experienced users.</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>'''Diagrams and Maps'''</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>'''Diagrams and Maps'''</div></td></tr>
</table>DanielShttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13353&oldid=prevDanielS at 12:33, 18 May 20132013-05-18T12:33:39Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Reach Routing ===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Reach Routing ===</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The Reach Routing module describes the flow phenomena in the channel via a cinematic wave-like normal mode  and the calculation of the rapidity of flow according to MANNING & STRICKLER. The only parameter (TA) that needs to be set is a routing coefficient which must be set by the user. It represents the travel time of the discharge wave which moves from the channel to the runoff after a precipitation event. Its value as well as the stream’s rapidity of flow (v) and the flow length (fl) <del class="diffchange diffchange-inline">is </del>needed for the calculation of a runoff retention coefficient (Rk).  </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The Reach Routing module describes the flow phenomena in the channel via a cinematic wave-like normal mode  and the calculation of the rapidity of flow according to MANNING & STRICKLER. The only parameter (TA) that needs to be set is a routing coefficient which must be set by the user. It represents the travel time of the discharge wave which moves from the channel to the runoff after a precipitation event. Its value as well as the stream’s rapidity of flow (v) and the flow length (fl) <ins class="diffchange diffchange-inline">are </ins>needed for the calculation of a runoff retention coefficient (Rk).  </div></td></tr>
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</table>DanielShttps://jams.uni-jena.de/ilmswiki/index.php?title=Hydrological_Model_J2000&diff=13350&oldid=prevDanielS at 21:10, 15 May 20132013-05-15T21:10:36Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Ground Water Module ===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== Ground Water Module ===</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The model concept of the ground water module in J2000 offers the viewing of the ground water runoff of all geologic formations that occur in the catchment area in consideration of the different <del class="diffchange diffchange-inline">Speicher- </del>and <del class="diffchange diffchange-inline">Abflussverhalten</del>. In the individual geologic units there is a distinction between the upper ground-water reservoir (RG1) in loose weathered material with high permeability and the lower ground-water reservoir (RG2) in fractures and clefts of the bedrock. Consequently, two basis runoff components are generated: a fast one from the upper ground-water reservoir and a slow one from the lower ground-water reservoir. The filling of the ground-water reservoir results from the vertical runoff component of the soil module. The emptying can be carried out by the lateral subterranean runoff components as well as capillary elevation in the unsaturated zone. The parameterization of ground-water reservoirs is carried out with the definition of the maximum storage capacity of the upper (maxRG2) and the lower (max RG1) ground water reservoir as well as a retention coefficient each for both reservoirs (recRG1) and (recRG2). Both parameters need to be determined for each geologic entity separately. The maximum storage capacity results from the product of the cavity and the thickness of the individual storage per m² unit area. The calculation of the water yield is carried out against the actual storage fillings as a linear drain function. The storage retention coefficients, which are to be seen as residence times of the water in the storage of interest, are taken into account as factor of the actual storage content (actRG1 and actRG2) for the calculation of the ground water runoff (outRG1 and outRG2):  </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The model concept of the ground water module in J2000 offers the viewing of the ground water runoff of all geologic formations that occur in the catchment area in consideration of the different <ins class="diffchange diffchange-inline">storage </ins>and <ins class="diffchange diffchange-inline">runoff behaviours</ins>. In the individual geologic units there is a distinction between the upper ground-water reservoir (RG1) in loose weathered material with high permeability and the lower ground-water reservoir (RG2) in fractures and clefts of the bedrock. Consequently, two basis runoff components are generated: a fast one from the upper ground-water reservoir and a slow one from the lower ground-water reservoir. The filling of the ground-water reservoir results from the vertical runoff component of the soil module. The emptying can be carried out by the lateral subterranean runoff components as well as capillary elevation in the unsaturated zone. The parameterization of ground-water reservoirs is carried out with the definition of the maximum storage capacity of the upper (maxRG2) and the lower (max RG1) ground water reservoir as well as a retention coefficient each for both reservoirs (recRG1) and (recRG2). Both parameters need to be determined for each geologic entity separately. The maximum storage capacity results from the product of the cavity and the thickness of the individual storage per m² unit area. The calculation of the water yield is carried out against the actual storage fillings as a linear drain function. The storage retention coefficients, which are to be seen as residence times of the water in the storage of interest, are taken into account as factor of the actual storage content (actRG1 and actRG2) for the calculation of the ground water runoff (outRG1 and outRG2):  </div></td></tr>
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</table>DanielS