CropSyst User Manual - sipeaa

More documents

Recommendations

Info

λ (MJ/kg)is the latent heat of vaporization derived from average air temperature (T avg °C).λ = 2.501 - T avg · 0.002361SoilHeatFluxthe soil heat flux is simply derived from net radiation:SoilHeatFlux = Rad net · 0.1γ (kPa/°C)is the psychometric constant given by:C p · Pγ =0.622 · λwhereC p ((MJ/kg)/°C) is the specific heat of air (about about 0.001).Pis the atmospheric pressure (taken as 96 kPa).λ (MJ/kg) is the latent heat of vaporization.
Partitioning potential evapotranspirationThe potential evapotranspiration (ET pot ) determined by any of the three ET models requires partitioninginto potential transpiration (usually of a crop or reference plant type) (Tr pot ), potential soil evaporation(EvapSoil pot ), and potential residue evaporation (EvapResidue pot )Potential transpirationPotential crop transpiration in m/day is calculated from:whereTr pot = fractCover green · ET potfractCover green is the fraction of incident radiation intercepted by the crop green leaf area.Potential residue evaporationPotential residue evaporation (m/day) is a function of residue and canopy cover:whereET pot (m/day)EvapResidue pot = fractCover Residue · (1 - fractcover canopy ) · ET potis the potential crop evapotranspiration.fractCover canopy is the fraction incident radiation intercepted by the crop canopy.fractCover Residue is the fraction incident radiation intercepted by the residue, estimated from themass of residue ( Gregory, 1982 ):whereA m (m²/kg)fractCover Residue = 1 - e (-A m · M)is the area covered by one average straw per mass of one averagestraw crop parameterM (kg/m²) is the total residue mass per unit soil area.Potential soil evaporationPotential soil evaporation in (mm/day) is calculated from:EvapSoil pot = (1 - fractCover Residue ) · (1 - fractCover canopy ) · ET pot
Page 1 and 2:
Cropping Systems Simulation ModelUs
Page 3 and 4:
❍■■■■■■■■Soil■
Page 5 and 6:
AbstractCropSyst is a is a user-fri
Page 8 and 9:
This will save the currently edited
Page 10 and 11:
The simulation will create a subdir
Page 12 and 13:
DOS parameter editorTo run CropSyst
Page 14 and 15:
●LocationThe remaining main menu
Page 16 and 17:
edited.Simulation descriptionA desc
Page 18 and 19:
Chemical simulationWhen enabled, ch
Page 20 and 21:
NH4 - Ammonium (kg N/ha initial N)N
Page 22 and 23:
Soil profile initializationCropSyst
Page 24 and 25:
Crop and management rotation tableC
Page 26 and 27:
extension). Create the management f
Page 28 and 29:
Residue water content (m³/kg)refer
Page 30 and 31:
This is different than long term sc
Page 32 and 33:
Additional requirementsIn order for
Page 34 and 35:
Running CropSyst from the DOS comma
Page 36 and 37:
●●●●●●Green area indexT
Page 38 and 39:
Management parameter editorCropSyst
Page 40 and 41:
To delete an entry in the table, se
Page 42 and 43:
January and December the year will
Page 44 and 45:
specified if automatic irrigation i
Page 46 and 47:
Based on biomassIn this mode, clipp
Page 48 and 49:
Clipping fateFor either the Based o
Page 50 and 51:
Contouring factorLand Slope Pc valu
Page 52 and 53:
Based on nitrogen balanceNeed descr
Page 55 and 56:
Tillage and residue stubble operati
Page 57 and 58:
105 Irrigated soil dry 5 -SCSCode D
Page 59 and 60:
119 Heavy double disc irrig. 36" 85
Page 61 and 62:
Crop classificationThe first parame
Page 63 and 64:
Crop planting parametersPlanting mo
Page 65 and 66:
SoybeanSunflowerWheatGrass (cropped
Page 67 and 68:
Thermal time to cease temperature l
Page 69 and 70:
❍Actual transpiration.
Page 71 and 72:
Maximum leaf area index (LAI)The le
Page 73 and 74:
Soybean 1.4-1.8 4 - 7Sunflower 1.7-
Page 75 and 76:
eginning of grain filling X X -phys
Page 77 and 78:
(mm/day) 10.0 - - - - - - - - - - 1
Page 79 and 80:
Vernalization day requirement to co
Page 81 and 82:
Crop harvestHarvest classificationT
Page 83 and 84:
Crop residueThe amount of residue p
Page 85 and 86:
Crop nitrogenNitrogen fixationFor l
Page 87 and 88:
Crop salinityOsmotic potential for
Page 89 and 90:
Crop dormancyAverage temperature fo
Page 91 and 92:
Soil parameter editorThe soil entry
Page 93 and 94:
Soil volatilizationVolatilization o
Page 95 and 96:
SCS Curve number runoffCropSyst use
Page 97 and 98:
Soil texturePercent Sand, Clay, Sil
Page 99 and 100:
Soil layersThe number of soil layer
Page 101 and 102:
Information Source:❍ soil propert
Page 103 and 104:
weather files and specify the prefi
Page 105 and 106:
●●Arnold and William, 1989 .For
Page 107 and 108:
❍parameters tableFor other sites,
Page 109 and 110:
Min relative humidity, wind speedFo
Page 111 and 112:
WindWind parameters are used by the
Page 113 and 114:
Daily weather FilesWeather files ar
Page 115 and 116: General layout optionsCurrently the
Page 117 and 118: includes a balance for each chemica
Page 119 and 120: Arc CropSyst CoöperatorThe Arc Cro
Page 121 and 122: Using the ArcCS project editorThe p
Page 123 and 124: The output page is used to specify
Page 125 and 126: Questions●●What is a "combined
Page 127 and 128: Note that only the numeric fields a
Page 129 and 130: GIS Coverages/ThemesA GIS Coverage
Page 131 and 132: 6940745.000000 21426.680000 71 70 2
Page 133 and 134: 1.93 6.7 4 3 SOIL30.87 3.9 5 2 SOIL
Page 135 and 136: ArcCS outputsA number of output fil
Page 137 and 138: Error log fileA detailed error log
Page 139 and 140: Visualizing Coöperator outputsOnce
Page 142 and 143: Watershed wizardThe Watershed wizar
Page 144 and 145: Graphics viewerThis utility is avai
Page 146 and 147: Report viewerThis utility is availa
Page 148 and 149: Batch run editorThe batch run edito
Page 150 and 151: DOS version batch run editorLike th
Page 152 and 153: Hints & Trouble Shooting:1.CROPSYST
Page 154 and 155: Simulation modelThis model is a dai
Page 156 and 157: Infiltration and soil water storage
Page 158 and 159: PrecipitationPreciptation is taken
Page 160 and 161: Potential evapotranspirationThe pot
Page 162 and 163: Penman-Monteith evapotranspirationm
Page 164 and 165: Relhumid min % Is the minimum relat
Page 168 and 169: Soil evaporationActual soil evapora
Page 170 and 171: Runoff simulationsTwo water runoff
Page 172 and 173: PAW * =nlΣPAW l [ Z l - Z l-1Z l]l
Page 174 and 175: Row crops Terraced Good D 64 81 92R
Page 176 and 177: Pasture or Range Straight row Good
Page 178 and 179: REI' day is 0 if no daily precipita
Page 180 and 181: contours that store moisture and re
Page 182 and 183: greater than air dry water content
Page 184 and 185: Original soil freezing modelThe soi
Page 186 and 187: whereRFI1 (C- days ) is the require
Page 188 and 189: The use of these equations is expla
Page 190 and 191: Crop growth and developmentThe crop
Page 192 and 193: Crop plantingCropSyst provides two
Page 194 and 195: RootingRoot growth occurs soon afte
Page 196 and 197: PhenologyThe stages of development
Page 198 and 199: Above ground biomass accumulationCr
Page 200 and 201: Crop TranspirationAs a function of
Page 202 and 203: C Tc · K · (ψ l,sc - ψ l,wilt )
Page 204 and 205: The fraction of GAI produced in eac
Page 206 and 207: VernalizationVernalization in crops
Page 208 and 209: Photo-periodPlant development may r
Page 210 and 211: Residue surface (kg/m²) is the amo
Page 212 and 213: Nitrogen-dependent growthThe values
Page 214 and 215: CNU (kg/m²)is cumulative nitrogen
Page 216 and 217:
UP max (kg N/day/m)is the maximum n
Page 218 and 219:
Fix w is constrained to the range [
Page 220 and 221:
C out (kg N/m³ water) is the nitro
Page 222 and 223:
NRATE 35 = 0.8 (1/day) is the nitri
Page 224 and 225:
Actual residue evaporationActual re
Page 226 and 227:
Residue decompositionThe residue le
Page 228 and 229:
Note: Subsurface residues (shallow,
Page 230 and 231:
Irrigation management simulationAut
Page 232 and 233:
Simulation of the affects of tillag
Page 234 and 235:
steepness factor for the universal
show all

CropSyst User Manual - sipeaa

Create successful ePaper yourself

Delete template?

Save as template?