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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
fertdaysin 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. Parameter irrcrop determine if irrigation is used for a crop.
- T1 source: Tracer T1 application.
The general unit (U) is used in tables of parameters and input data where the unit is not defined.
| 1 | nr | - | General | This column with row numbers is usually given to see the order of the crops, but is not read by the program. |
| 2 | cropid | - | General | crop ID number (used in GeoClass.txt) |
| 3 | reg | - | General | integer, agricultural region number (e.g. production region from agricultural statistics) (corresponds to region in GeoData.txt). Note, all regions defined in GeoData.txt must also be defined in CropData.txt |
| 4 | fn1 | kg/(ha yr) | Fertiliser | amount of N in fertiliser (1st application) (100% IN) |
| 5 | fp1 | kg/(ha yr) | Fertiliser | amount of P in fertiliser (1st application) (100% SP) |
| 6 | mn1 | kg/(ha yr) | Fertiliser | amount of N in manure (1st application) (50% IN) |
| 7 | mp1 | kg/(ha yr) | Fertiliser | amount of P in manure (1st application) (50% SP) |
| 8 | fday1 | julian day | Fertiliser | day number for application of fertiliser (1st application) |
| 9 | mday1 | julian day | Fertiliser | day number for application of manure (1st application) |
| 10 | fdown1 | - | Fertiliser | fraction of fertiliser that is tilled down to second soil layer (1st application) |
| 11 | mdown1 | - | Fertiliser | fraction of manure that is tilled down to second soil layer (1st application) |
| 12 | fn2 | kg/(ha yr) | Fertiliser | amount of N in fertiliser (2nd application) (100% IN) |
| 13 | fp2 | kg/(ha yr) | Fertiliser | amount of P in fertiliser (2nd application) (100% SP) |
| 14 | mn2 | kg/(ha yr) | Fertiliser | amount of N manure (2nd application) (50% IN) |
| 15 | mp2 | kg/(ha yr) | Fertiliser | amount of P manure (2nd application) (50% SP) |
| 16 | fday2 | julian day | Fertiliser | day number for application of fertiliser (2nd application) |
| 17 | mday2 | julian day | Fertiliser | day number for application of manure (2nd application) |
| 18 | fdown2 | - | Fertiliser | fraction of fertiliser that is tilled down to second soil layer (2nd application) |
| 19 | mdown2 | - | Fertiliser | fraction of manure that is tilled down to second soil layer (2nd application) |
| 20 | resn | kg/(ha yr) | Turnover | amount of N that is added to the pool stored in the soil from decaying plants |
| 21 | resp | kg/(ha yr) | Turnover | amount of P that is added to the pool stored in the soil from decaying plants |
| 22 | resc | kg/(ha yr) | Turnover | amount of organic C that is added to the pool stored in the soil from decaying plants |
| 23 | resday | julian day | Turnover | day number for application of decaying plants, if set to 0, a uniform application all year round is assumed |
| 24 | resdown | - | Turnover | fraction of decaying plants that are tilled down to the second soil layer |
| 25 | resfast | - | Turnover | fraction of decaying plants that are added to the fast turnover pool, used for N and P |
| 26 | up1 | g/(m2 y) | Turnover | parameter 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. |
| 27 | up2 | - | Turnover | parameter for the crop’s potential uptake function (logistic growth) - typically 1 |
| 28 | up3 | 1/day | Turnover | parameter for the crop’s potential uptake function (logistic growth) - typically 0.12 1/day |
| 29 | upupper | - | Turnover | fraction of nutrient uptake in uppermost soil layer |
| 30 | pnupr | - | Turnover | P-N relationship for nutrient uptake |
| 31 | bd1 | julian day | Turnover | day number for spring ploughing, give 0 if no spring ploughing. |
| 32 | bd2 | julian day | Turnover | day 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. |
| 33 | bd3 | julian day | Turnover | day number for harvest (end of growing season) |
| 34 | bd4 | julian day | Turnover | day number for autumn ploughing, 0 if no autumn ploughing |
| 35 | bd5 | julian day | Turnover | day number for autumn crop’s grown season start (typically sow date or some days later), 0 if not used |
| 36 | ccmax1 | - | Turnover | Maximum 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). |
| 37 | ccmax2 | - | Turnover | Maximum 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. |
| 38 | gcmax1 | - | Turnover | Maximum 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). |
| 39 | gcmax2 | - | Turnover | Maximum ground cover fraction (between 0 and 1) for harvested crops during the autumn-winter growth period. Always 0 for permanent vegetation. |
| 40 | irrcrop | - | Irrigation | Flag for irrigated crops (1 for irrigated, 0 for other (default)) |
| 41 | plantday | julian day | Irrigation | day number for planting |
| 42 | lengthini | days | Irrigation | number of days for initial crop growth period |
| 43 | kcbini | - | Irrigation | basal crop coefficient for initial crop growth period |
| 44 | lengthdev | days | Irrigation | number of days for development crop growth period |
| 45 | lengthmid | days | Irrigation | number of days for middle crop growth period |
| 46 | kcbmid | - | Irrigation | basal crop coefficient for middle crop growth period |
| 47 | lengthlate | days | Irrigation | number of days for late crop growth period |
| 48 | kcbend | - | Irrigation | basal crop coefficient for end of late crop growth period |
| 48 | dlref | - | Irrigation | reference depletion level |
| 50 | imm_start | julian day | Irrigation | day number for start of immersion period. Zero (default) for non-immersed crops. |
| 51 | imm_end | julian day | Irrigation | day number for end of immersion period (immersion period must be contained in irrigation period). Zero (default) for non-immersed crops. |
| 52 | daylength | hours | Turnover/ Irrigation | length of day needed to start accumulate GDD (alternative method for start of growth season) |
| 53 | gddsow | degreedays | Turnover/ Irrigation | GDD needed to start growth season (alternative method for start of growth season) |
| 54 | basetemp | degree Celsius | Turnover/ Irrigation | temperature deducted from airtemp when calculating GDD (typical value 0-10) (alternative method for start of growth season) |
| 55 | firstday | julian day | Turnover/ Irrigation | first day when GDD accumulation can start. Usually set to 1 (alternative method for start of growth season) |
| 56 | tamount | U/ha | T1 source | amount of T1 to be applied per year and ha |
| 57 | tyear | - | T1 source | year to apply T1, if zero T1 will be applied every year |
| 58 | tday | julian day | T1 source | day to start T1 application |
| 59 | tnumdays | days | T1 source | number of days with T1 application (with start at tday) |
| 60 | tdaydown | julian day | T1 source | day number for T1 to be tilled down |
| 61 | tdown1 | - | T1 source | fraction of T1 above soil pool that are tilled down to the first soil layer |
| 62 | tdown2 | - | T1 source | fraction of T1 above soil pool that are tilled down to the second soil layer |
start/hype_file_reference/cropdata.txt.txt · Last modified: 2023/11/16 14:28 (external edit)
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