SoilWaterBalance-Introduction

Monday, October 7, 2019 4:04:00 PM

Soil Water (Moisture) balance equation at micro-watershed land parcel scale is defined as:

Change in soil moisture storage =Rainfall + Irrigation - Surface runoff - Evapotranspiration - Deep percolation 

Source for this module:

  1. Allen, R.G., Pereira, L.S., Smith, M., Raes, D. and Wright, J.L., FAO-56 dual crop coefficient method for estimating evaporation from soil and application extensions. Irri. Drain. Eng., 2005, 131, 2-13.
  2. Allen, R.G., Pereira, L.S., Raes, D. and Smith, M., Crop evapo-transpiration - guidelines for computing crop water requirements – FAO irrigation and drainage paper 56. FAO - Food and Agriculture Organization of the United Nations, Rome, 1998.
  1. United States Department of Agriculture (USDA), 2012, Soil Survey Manual, Handbook No:18, USDA, USA.
  2. Schapp MG, Leij FJ, Van Genuchten M Th, 2001. “ROSETTA: A computer program for estimating soil hydraulic parameters with hierarchical pedotransfer function. Journal of Hydrology, 251(3) 163-176.
  3. Savva, A. P. and Frenken, K. (2002).Crop Water Requirements and Irrigation Scheduling (irrigation manual Module 4) Water Resources Development and Management Officers FAO Sub-Regional Office for East and Southern Africa. pp 85-89.
  4. Arnold JG, Allen PM. 1996. Estimating hydrologic budgets for three Illinois watersheds. Journal of Hydrology 176: 57–77.
  5. Garg KK, Wani SP, Patil MD, 2016. Simple and farmer-friendly decision support system for enhancing water use efficiency in agriculture: tool development, testing and validation. Current Science 110(9): 1716-1729.