A Water Management Model for Artificially Drained SoilsNorth Carolina Agricultural Research Service, 1980 - 54 sivua Bespreking van een waterbeheersingsmodel en de toepasbaarheid ervan in de praktijk |
Yleiset termit ja lausekkeet
100 DRAIN SPACING April 15 assumed Bouwer cm-days component controlled drainage crop production dependent depression storage determine drain depth drain tubes DRAINAGE FLUX drainage rate drainage systems drained to equilibrium DRAINMOD dry days DRY ZONE DEPTH evaluate evaporation rate factors Figure 11 Green-Ampt equation growing season HOURLY RAINFALL humid regions hydraulic conductivity impermeable layer increment infiltration capacity initial water content input data IRRIGATION SCHEDULE Lumbee soil maximum mm/day number of dry parameters plant predicted present version pressure head RECURRENCE INTERVAL Richards equation root zone runoff saturated Schilfgaarde seedbed preparation SEW30 value soil profile soil water conditions soil water content soil water distribution solutions subroutine subsurface drainage surface and subsurface surface runoff surface storage tion unsaturated zone upward water movement Wagram loamy sand Wagram soil wastewater water balance water content distribution water level water management system water table depth water table elevation wet zone YRI basis