The following reports are available for catchments using the MABIA Method. The most important reports are Land Class Inflows and Outflows, Depletion and Available Water, ET Actual and Potential, Precipitation and Irrigation, and Crop Yield. Because the MABIA Method operates on a daily timestep, many reports are daily, although some are also aggregated to monthly. Tip: Because daily results use so much disk space, you might want to turn off those that you do not need -- see Customizing Result Variables for more information.
A detailed breakdown of inflows to and outflows from catchments and their sub land classes, including precipitation, irrigation, surface runoff, evaporation, transpiration, flow to groundwater, increase or decrease in soil moisture, both daily and monthly.
The area for each of the land classes designated in the catchment
Volume of flows from catchments to surface due solely to precipitation.
Depth or volume of precipitation, daily or monthly.
Actual evapotranspiration, including from irrigation.
For the top soil layer (bucket 1), the current saturation, graphed against maximum saturation, field capacity, readily available water and wilt point, all shown as a percent of soil volume.
For the top soil layer (bucket 1), the current saturation, graphed against maximum saturation, field capacity, readily available water and wilt point, all shown as a depth.
For the bottom soil layer (bucket 2), the current saturation, graphed against maximum saturation, field capacity and wilt point, all shown as a percent of soil volume.
For the bottom soil layer (bucket 2), the current saturation, graphed against maximum saturation, field capacity and wilt point, all shown as a depth.
View soil moisture depletion against the Readily Available Water (RAW) and Total Available Water (TAW) thresholds, all shown as a depth. Choose "All Variables" on the legend to see them all graphed at once.
Actual and potential evapotranspiration. Choose "All Variables" on the legend to see them both graphed at once.
Does not include precipitation that is not effective, or losses due to Irrigation Efficiency < 1, or amounts of precipitation or irrigation which exceed the Maximum Infiltration Rate. Choose "All Variables" on the legend to see both precipitation and irrigation graphed at once.
Choose "All Variables" on the legend to see them all graphed at once.
The total production from crops cultivated in the catchment. Choose "All Crops" on the legend to see the breakdown by crop.
The total production multiplied by the market price for the crops. Choose "All Crops" on the legend to see the breakdown by crop.
The value of the Penman-Monteith reference crop potential evapotranspiration
The daily precipitation that is available for evaporation and transpiration (the remainder is direct runoff).
Maximum daily incident solar insolation per unit area.
Potential crop coefficient, including Kcb and Ke (transpiration and evaporation).
Actual crop coefficient, including Kcb and Ke (transpiration and evaporation).
The amount of water that would be consumed by evapotranspiration in the catchment if no water limitations exist.
The actual amount of water consumed by evapotranspiration in the catchment, including water supplied by irrigation
The portion of ET that is evaporation
The portion of ET that is transpiration
Amount of effective Irrigation available for ET consumption (i.e., actual irrigation * irrigation efficiency). Includes any irrigation use of runoff, although this will not be visible when viewing results on the map.
Flows from catchments to surface water, both daily and monthly.
Flows from catchments to groundwater, both daily and monthly.
Decrease in the water in the soil layers, both daily and monthly.
Increase in the water in the soil layers, both daily and monthly.
Decrease in the water in the aboveground surface storage, e.g., for rice paddies or wetlands, or temporary river flooding, both daily and monthly.
Increase in the water in the aboveground surface storage, e.g., for rice paddies or wetlands, or temporary river flooding, both daily and monthly.
The depletion of soil moisture, ranging from 0 (no depletion) to Total Available Water (total depletion -- -wilt point).
Readily available water represents the threshold beyond which the crop will suffer water stress, reducing its yield.
Total available water represents the threshold beyond which the crop will reach permanent wilt point.
Maximum depth of water that can be evaporated from the surface soil layer without restriction.
Maximum depth of water that can be evaporated from the surface soil layer assuming that the soil was completely wetted.
For the surface soil layer: Depletion, Readily Evaporable Water and Total Evaporable Water.
Depletion of the surface soil layer.
The average fraction of irrigation water supplied that flows to surface water.
The average fraction of irrigation water supplied that flows to groundwater.
The lowest depth of the roots.
The depth of aboveground water storage, e.g., for rice paddies, wetlands or river flooding.
The volume of infiltration to groundwater assuming no irrigation.
The volume of infiltration to groundwater assuming full irrigation.
The volume of infiltration from a catchment's subbranch to groundwater assuming no irrigation.
The volume of infiltration from a catchment's subbranch to groundwater assuming full irrigation.
The following two results are available in the Demand section:
An irrigation shortfall in one timestep will cause an increased irrigation demand in subsequent timesteps because of the holdover soil moisture deficit. "Theoretical Catchment Irrigation Demand" will reflect only the demand from the current timestep's evapotranspiration, not counting any holdover soil moisture deficit from previous timesteps. Because calculating theoretical demand requires additional calculations, it may slow down calculations somewhat. If you turn off this variable -- see Customizing Result Variables -- it will not be calculated.
This is the annual sum of Theoretical Catchment Irrigation Demand minus the annual sum of Irrigation (Supply Delivered) to the catchment branch. This is the "actual" unmet demand, which is not based on the double counted irrigation demand that occurs in cases of irrigation shortage.
See also: MABIA Calculation Algorithms