Estimated seepage rate for paddy rice.
There will only be an answer here if paddy rice is grown in a project. This is the percent of water applied to fields that goes below the root zone of the rice. Seepage rates are often expressed in mm/day, in which case they must be converted to a percentage of the field-applied irrigation water.
Many studies combine “seepage” together with “evapotranspiration” for rice, to come up with a combined “consumptive use”. That convention is not used in irrigation assessment, because such a combination makes it very difficult to separate ET (which cannot be recirculated or reduced) from seepage water (which can be recirculated via wells or drains). Furthermore, such a convention ignores the fact that deep percolation is unavoidable on all crops, not just on paddy rice. Therefore, the convention would apply to all crops, not just paddy rice.