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start:hype_file_reference:cropdata.txt

CropData.txt

This file includes variables relating to crops, including irrigation characteristics, and other vegetation. All vegetation is called crops in the text below, e.g. also forest. CropData.txt is only needed for nutrient or irrigation modelling, but can be used for water and tracer simulations. Crops in HYPE have a number of static properties, e.g. sowing and harvesting dates, which are read from CropData.txt. The handling of these properties assume the catchment is on the Northern hemisphere, i.e. that summer is the growing season. Crops are part of the unique combination making up an SLC class, as defined in GeoClass.txt. To allow for modifying properties of a certain crop within the model domain, e.g. to reflect climate gradients, several crop regions can be defined with corresponding variables region in GeoData.txt and reg in CropData.txt.

CropData.txt is a tab-separated text file located in the modeldir folder. The first row contains a column header with variable names. Variable names are not case-sensitive (max. 10 characters, no spaces). The following rows contain variable values for each crop. Columns with headings unknown to HYPE are skipped while reading the file. A text column may contain at most 100 characters. The first column is often used for a descriptive name of the crop, and not read by HYPE. The columns may be in any order. A value must exist for every column and row, i.e. empty cells are not allowed.

Example for CropData.txt file structure:

name    nr  cropid reg fn1 fp1 fday1 fdown1 ...
grains  1   1      1   80  5   100   0.1    ...
grains  2   1      2   80  5   120   0.1    ...
grasses 3   2      1   0   0   100   0.1    ...
...     ... ...    ... ... ... ...   ...    ...

All crop characteristics are described in the table below. Column Type groups variables according to:

  • General: IDs to connect crop properties to other indata.
  • Fertiliser: Variables for fertiliser and manure application. NOTE: parameter fertdays in par.txt needs to be set to a value larger than zero for fertiliser and manure to be applied.
  • Turnover: Crop growth and biomass turnover properties.
  • Irrigation: Crop irrigation properties.
  • T1 source: Tracer T1 application.

The general unit (U) is used in tables of parameters and input data where the unit is not defined.

1nr-GeneralThis column with row numbers is usually given to see the order of the crops, but is not read by the program.
2cropid-Generalcrop ID number (used in GeoClass.txt)
3reg-Generalinteger, agricultural region number (e.g. production region from agricultural statistics) (corresponds to region in GeoData.txt)
4fn1kg/(ha yr)Fertiliseramount of N in fertiliser (1st application) (100% IN)
5fp1kg/(ha yr)Fertiliseramount of P in fertiliser (1st application) (100% SP)
6mn1kg/(ha yr)Fertiliseramount of N in manure (1st application) (50% IN)
7mp1kg/(ha yr)Fertiliseramount of P in manure (1st application) (50% SP)
8fday1julian dayFertiliserday number for application of fertiliser (1st application)
9mday1julian dayFertiliserday number for application of manure (1st application)
10fdown1-Fertiliserfraction of fertiliser that is tilled down to second soil layer (1st application)
11mdown1-Fertiliserfraction of manure that is tilled down to second soil layer (1st application)
12fn2kg/(ha yr)Fertiliseramount of N in fertiliser (2nd application) (100% IN)
13fp2kg/(ha yr)Fertiliseramount of P in fertiliser (2nd application) (100% SP)
14mn2kg/(ha yr)Fertiliseramount of N manure (2nd application) (50% IN)
15mp2kg/(ha yr)Fertiliseramount of P manure (2nd application) (50% SP)
16fday2julian dayFertiliserday number for application of fertiliser (2nd application)
17mday2julian dayFertiliserday number for application of manure (2nd application)
18fdown2-Fertiliserfraction of fertiliser that is tilled down to second soil layer (2nd application)
19mdown2-Fertiliserfraction of manure that is tilled down to second soil layer (2nd application)
20resnkg/(ha yr)Turnoveramount of N that is added to the pool stored in the soil from decaying plants
21respkg/(ha yr)Turnoveramount of P that is added to the pool stored in the soil from decaying plants
22resckg/(ha yr)Turnoveramount of organic C that is added to the pool stored in the soil from decaying plants
23resdayjulian dayTurnoverday number for application of decaying plants, if set to 0, a uniform application all year round is assumed
24resdown-Turnoverfraction of decaying plants that are tilled down to the second soil layer
25resfast-Turnoverfraction of decaying plants that are added to the fast turnover pool, used for N and P
26up1g/(m2 y)Turnoverparameter for the crop’s potential uptake function (logistic growth) - typically 20 g N/m2/year for grains, 40 g N/m2/year for grasses. Note: must be larger than or equal to up2. A value equal to up2 indicates no uptake of nutrients.
27up2-Turnoverparameter for the crop’s potential uptake function (logistic growth) - typically 1
28up31/dayTurnoverparameter for the crop’s potential uptake function (logistic growth) - typically 0.12 1/day
29upupper-Turnoverfraction of nutrient uptake in uppermost soil layer
30pnupr-TurnoverP-N relationship for nutrient uptake
31bd1julian dayTurnoverday number for spring ploughing, give 0 if no spring ploughing.
32bd2julian dayTurnoverday number for start of growth season in spring (typically sow date or a few days later). Default method for start of growth season, but also needed for ground cover/crop cover calculations.
33bd3julian dayTurnoverday number for harvest (end of growing season)
34bd4julian dayTurnoverday number for autumn ploughing, 0 if no autumn ploughing
35bd5julian dayTurnoverday number for autumn crop’s grown season start (typically sow date or some days later), 0 if not used
36ccmax1-TurnoverMaximum crop cover fraction (between 0 and 1) for harvested crops during the spring-summer growth period.
OR
Maximum crop cover fraction for permanent vegetation (e.g. forest).
37ccmax2-TurnoverMaximum crop cover fraction (between 0 and 1) for harvested crops during the autumn-winter growth period (e.g. set to 0 for spring-sown crops, and to > 0 for autumn-sown crops). Always 0 for permanent vegetation.
38gcmax1-TurnoverMaximum ground cover fraction (between 0 and 1) for harvested crops during the spring-summer growth period.
OR
Maximum ground cover fraction for permanent vegetation (e.g. forest).
39gcmax2-TurnoverMaximum ground cover fraction (between 0 and 1) for harvested crops during the autumn-winter growth period. Always 0 for permanent vegetation.
40plantdayjulian dayIrrigationday number for planting
41lengthinidaysIrrigationnumber of days for initial crop growth period
42kcbini-Irrigationbasal crop coefficient for initial crop growth period
43lengthdevdaysIrrigationnumber of days for development crop growth period
44lengthmiddaysIrrigationnumber of days for middle crop growth period
45kcbmid-Irrigationbasal crop coefficient for middle crop growth period
46lengthlatedaysIrrigationnumber of days for late crop growth period
47kcbend-Irrigationbasal crop coefficient for end of late crop growth period
48dlref-Irrigationreference depletion level
49imm_startjulian dayIrrigationday number for start of immersion period
50imm_endjulian dayIrrigationday number for end of immersion period (immersion period must be contained in irrigation period)
51daylengthhoursTurnoverlength of day needed to start accumulate GDD (alternative method for start of growth season)
52gddsowdegreedaysTurnoverGDD needed to start growth season (alternative method for start of growth season)
53basetempdegree CelsiusTurnovertemperature deducted from airtemp when calculating GDD (typical value 0-10) (alternative method for start of growth season)
54firstdayjulian dayTurnoverfirst day when GDD accumulation can start. Usually set to 1 (alternative method for start of growth season)
55tamountU/haT1 sourceamount of T1 to be applied per year and ha
56tyear-T1 sourceyear to apply T1, if zero T1 will be applied every year
57tdayjulian dayT1 sourceday to start T1 application
58tnumdaysdaysT1 sourcenumber of days with T1 application (with start at tday)
59tdaydownjulian dayT1 sourceday number for T1 to be tilled down
60tdown1-T1 sourcefraction of T1 above soil pool that are tilled down to the first soil layer
61tdown2-T1 sourcefraction of T1 above soil pool that are tilled down to the second soil layer
start/hype_file_reference/cropdata.txt.txt · Last modified: 2017/04/25 15:56 by cpers