A Model for Managing Irrigated Agriculture1

: Irrigation in arid and semiarid regions has led to accumulation of salts, destruction of soil texture, decline in fertility and yield, and eventual abandoning of the land. The problems of irrigated agriculture may be attributed to the fact that managers seldom consider irrigated land as a system consisting of a number of components and that the individual health of each component is vital to the overall health of the entire system. A management model is described here which considers all the important components of an irrigated system and may help maintain a permanent irrigated agriculture. The model optimizes net farm income, maintains favorable hydrologic and salt balance in the irrigated system, meets the concentration requirements of the drainage water for the individual crops, and simulates the impact of the irrigation on the unsaturated and the saturated zone.

[1]  J. Rhoades,et al.  Calculated Drainage Water Compositions and Salt Burdens Resulting from Irrigation with River Waters in the Western United States 1 , 1975 .

[2]  J. Rhoades,et al.  Salts in Irrigation Drainage Waters: I. Effects of Irrigation Water Composition, Leaching Fraction, and Time of Year on the Salt Compositions of Irrigation Drainage Waters , 1973 .

[3]  R. Adams,et al.  Salt and Silt in Ancient Mesopotamian Agriculture: Progressive changes in soil salinity and sedimentation contributed to the breakup of past civilizations. , 1958, Science.

[4]  George F. Pinder,et al.  Application of the Digital Computer for Aquifer Evaluation , 1968 .

[5]  Irfan A. Khan.  GROUND WATER SIMULATION USING A ONE DIMENSIONAL FLOW MODEL , 1979 .

[6]  L. A. Richards.  Diagnosis and Improvement of Saline and Alkali Soils , 1954 .

[7]  J. Labadie,et al.  River basin salinity management via the ASTRAN method: I. Model development☆ , 1979 .

[8]  L. E. Francois,et al.  COMPARISONS OF DRIP, FURROW, AND SPRINKLER IRRIGATION , 1973 .

[9]  S. Nairizi,et al.  Effects of Dated Soil Moisture Stress on Crop Yields , 1977, Experimental Agriculture.

[10]  W. R. Gardner,et al.  LABORATORY STUDIES OF EVAPORATION FROM SOIL COLUMNS IN THE PRESENCE OF A WATER TABLE , 1958 .

[11]  George F. Pinder,et al.  Finite difference model for aquifer simulation in two dimensions with results of numerical experiments , 1976 .

[12]  Robert W. Hill,et al.  Computer Simulation of the Hydrologic and Salinity Flow Systems Within the Bear River Basin , 1973 .

[13]  Leonard F. Konikow,et al.  Modeling flow and chemical quality changes in an irrigated stream‐aquifer system , 1974 .

[14]  J. Riley,et al.  A Computer Model of the Quantity and Chemical Quality of Return Flow , 1971 .

[15]  J. Labadie,et al.  River basin salinity management via the ASTRAN method: II. Case study , 1979 .