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SVERIGES LANTBRUKSUNIVERSITET · PDF filespridning publiceras bl a i avdelningens rapport ... man av tillgang levereras fran avdelningen. Distribution: Sveriges Lantbruksuniversitet

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  • SVERIGES LANTBRUKSUNIVERSITET

    I Input files 11 Sw-itches [[Parameters j I Outputs 11 Execute I I Technical

    Model specific

    Henrik Eckersten

    Institutionen for markvetenskap Avdelningsmeddelande 91:4 Avdelningen for lantbrukets hydroteknik Communications

    Swedish University of Agricultural Sciences Uppsala 1991 Department of Soil Sciences ISSN 0282-6569 Division of Agricultural Hydrotechnics ISRN SlU-HY-AVDM--91/4--SE

  • Denna serie meddelanden utges av Avdelningen for lantbrukets hydroteknik, Sveriges Lantbruks-universitet, Uppsala. Serien inneh8.ller sad ana forsknings- och forsoksredogorelser samt andra uppsatser som bedoms vara av i forsta hand internt intresse. Uppsatser lampade for en mer allman spridning publiceras bl a i avdelningens rapport-serie. Tidigare nummer i meddelandeserien kan i man av tillgang levereras fran avdelningen.

    Distribution:

    Sveriges Lantbruksuniversitet Institutionen for markvetenskap Avdelningen for lantbrukets hydroteknik Box 7014 75007 UPPSALA

    Te\. 018-6711 69, 67 11 81

    This series of Communications is produced by the Division of Agricultural Hydrotechnics, Swedish University of Agricultural Sciences, Uppsala. The series concists of reports on research and field trials and of other articles considered to be of interest mainly within the department. Articles of more general interest are published in, for example, the department's Report series. Earlier issues in the Communications series can be obtained from the Division of Agricultural Hydro-technics (subject to availability).

    Swedish University of Agricultural Sciences Department of Soil Sciences Division of Agricultural Hydrotechnics P.O. Box 7014 S-750 07 UPPSALA, SWEDEN

    Te\. +46-(18) 6711 69, +46-(18) 6711 81

  • SVERIGES LANTBRUKSUNIVERSITET

    1 Input files 11 Switches Ilparameters J 1 Outputs 11 Execute Technical

    Model specific

    Henrik Eckersten

    Institutionen for markvetenskap Avdelningsmeddelande 91:4 Avdelningen for lantbrukets hydroteknik Communications

    Swedish University of Agricultural Sciences Uppsala 1991 Department of Soil Sciences (SSN 0282-6569 Division of Agricultural Hydrotechnics (SRN SLU-HY-AVDM--91/4--SE

  • Table of Contents

    1 Background ................................................................................................... 5

    2 Getting started .............................................................................................. 7 2.1 Installation....................... ...... .............. ........ ........ ......... ............... .......... 7 2.2 Files ...................................................................................................... 7 2.3 Demonstration example ............. .... .................................... ................... 7 2.4 Running the model ................................................................................ 7 2.5 Evaluating your simulation .................................................................... 7

    3 Program structure ......................................................................................... 8

    4 Input files ...................................................................................................... 8 4.1 Driving variable file .... ...... .......... ....... ....... ............ ........ ......... ................ 8 4.2 Parameter file .... .......... ....... ...... .... ..... ........ ....... ........ ........................... 8 4.3 Translation file ...................................................................................... 8 4.4 Initial states file ..................................................................................... 8 4.5 Final states file ..................................................................................... 8 4.6 Output file ... .......... ..... ............ ...... ..... ............ ......... ...... ......................... 9 4.7 Validation file ........................................................................................ 9 4.8 General file description ...... ..... ..... ...... ............ .......... ....................... ...... 9

    5 Run options... ....... ........... ...... ..... ....... .... ...... ........ ...... ....... ................... ....... ... 10 5.1 Run no.: ................................................................................................ 10 5.2 Start date: ............................................................................................. 10 5.3 End date: .............................................................................................. 10 5.4 Output interval: ..................................................................................... 10 5.5 No of iterations: ..................................................................................... 10 5.6 Run id: .................................................................................................. 10 5.7 Comment: ............................................................................................. 11

    6 Execute ......................................................................................................... 11 6.1 Exit ........................................................................................................ 11 6.2 Run ....................................................................................................... 11 6.3 Write a parameter file .. ...... ...... ............ ...... ...... ..................................... 11

    7 Warnings and Errors of parameter values ...... ...... ....... ..... ......... ................... 11

    8 Commands ................................................................................................... 11

    9 Problems. ..... ....... ...... ..... ...................... ...... ............ ....... ...... ....... .......... ......... 12

    10 Help ............................................................................................................ 12

    11 References ............................... ........... ..... .................................................. 12

    12 SWITCHES ................................................................................................. 14 12.1 Technical ............................................................................................ 14 12.2 Model Specific .. ........... ............ .... ................. ............. ......................... 16

    13 PARAMETERS ........................................................................................... 19 13.1 Start .................................................................................................... 19 13.2 Plant water ......................................................................................... 21 13.3 Resistance stomata ........................................................................... 21 13.4 Resistance:=other ................................................................................ 21

  • 13.5 Interception ........................................................................................ 22 13.6 Growth ................................................................................................ 22 13.7 Analytic_Start ...................................................................................... 23 13.8 Analytic .............. ......... ............... ...... ... ...................... .......................... 25 13.9 Plotting_on_line .................................................................................. 25 13.10 Sensitivity.... ......... .......... ..... ...... ..... ........... ............ ........... ....... .......... 26 13.11 Special .............................................................................................. 26

    14 OUTPUTS....... ............... ........ ............ ........................... .............................. 28 14.1 State variables .................................................................................... 28 14.2 Flow variables ..................................................................................... 28 14.3 Auxiliary variables ............................................................................... 28 14.4 Driving variables .... ................. ............... .......... ....... ............................ 30 14.5 Other variables calculated .............. ......... ................................. .......... 32

    15 News ........................................................................................................... 34

  • 1 Background (911029)

    The SP AC-GROWTH model is a combined transpiration-growth model based on the soil-plant-atmosphere-continuum concept and simulates the flow of water from soil trough plant to the atmosphere. The basic version of the model, which simulates the transpiration of a fixed plant that does not change in size, was described by Turner & Kowalik (1983) and Kowalik & Eckersten (1984). The plant has a reservoir of water that regulates the transpiration rate which affect the total growth rate (cf. Eckersten, 1986). The total growth is allocated to root, leaf+stem and grain, respectively (Eckersten & Jansson, 1990). The size of the plant in its turn, affect the evaporation of intercepted water and the transpiration through the leaf area index and root development (Fig. 1). The grain development can be cancelled for species that have only vegetative growth. For woody plants like willow the size of the plant water reservoir can be regulated with the special parameters. For plants more than one year old the biomass compartments represent the accumulated growth of the current year.

    Most of the input variables to the model needs to be given at a time scale of minutes

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