Dr. Aliasghar Montazar

UCCE Irrigation and Water Management Advisor
UC Cooperative Extension Advisor in Imperial & Riverside Counties
1050 East Holton Road
Holtville, CA 92250-9615
(442) 265-7707
amontazar@ucanr.edu Create VCard

Also in:
Riverside County


Dr. Aliasghar Montazar joined UCCE on June 1, 2017 as an Irrigation and Water Management Advisor. Prior to joining UCCE, Montazar was working as a Project Scientist in the Department of Plant Sciences at UC Davis since June 2014. From 2011 to 2014, he was a Research Associate in the Department of Land, Air and Water Resources (LAWR), UC Davis. He was formerly associate professor at the Department of Irrigation and Drainage Engineering, University of Tehran, Iran. Montazar has more than 15 years of research, extension, teaching, and technical consulting experience and has served in several leadership positions in agricultural water management and irrigation engineering in California and abroad.


Irrigation and water management, measurement and modeling of surface energy balance variables/ET and crop coefficients, irrigation scheduling, drainage and water quality, on-farm irrigation system management and evaluation, salinity management and control practices, deficit irrigation, environmental instrumentation and modelling.

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Montazar, A., Krueger, R., Corwin, D., Pourreza, A., Little, C., Rios, S., Snyder, R.L. (2020). Determination of Actual Evapotranspiration and Crop Coefficients of California Date Palms Using the Residual of Energy Balance Approach. Water 12(8), 2253; https://www.mdpi.com/2073-4441/12/8/2253.  

  • Montazar, A. (2019). Agricultural Irrigation (Book). MDPI, 172 pages, ISBN 978-3-03921-922-3 (Editor); https://www.mdpi.com/books/pdfview/book/1857.

  • Montazar. A., Cahn, M., Putman, A. (2019). Research advances in adopting drip irrigation for California organic spinach: Preliminary findings. Agriculture, 9(8), 177; https://doi.org/10.3390/agriculture9080177.

  • Lu, Y.Z., Liu, P., Montazar, A., Paw, K.T., Hu, Y.G. (2019). Soil water infiltration model for sprinkler irrigation control strategy: A case for tea plantation in Yangtze River region. Agriculture, 9(10), 206; https://doi.org/10.3390/agriculture9100206.

  • Zaccaria, D., Carrillo-Cobo, T., Montazar A., Putnam, D., Bali, K. (2017). Assessing the viability of sub-surface drip irrigation for resource-efficient alfalfa production in Central and Southern California. Water, 9(11), 837; https://doi.org/10.3390/w9110837.

  • Montazar, A., Zaccaria, D., Bali, K., Putnam, D. (2017). A model to assess the economic viability of alfalfa production under subsurface Drip Irrigation in California. Irrigation and Drainage, 66: 90–102. doi: 10.1002/ird.2091.

  • Montazar, A., Rejmanek, H., Tindula, G.N., Little, C., Shapland,T.M., Anderson, F.E., Inglese, G., Mutters, R.G., Linquist, B., Greer, C.A., Hill, J.E., Snyder, R.L. (2016). Crop coefficient curve for paddy rice from residual of the energy balance calculations. Journal of Irrigation and Drainage Engineering, DOI: 10.1061/(ASCE)IR.1943-4774.0001117.

  • Snyder, R.L, Pedras, C., Montazar, A., Henry, M.J., Ackley, D. (2015). Advances in ET-based urban landscape irrigation management. Agricultural Water Management 147:187-197.

  • Montazar, A. (2013). A decision tool for optimal irrigated crop planning and water resources sustainability. Global Optimization 55 (3): 641-654.

  • Montazar, A., Nasiri Gheidari, O., Snyder, R.L. (2013). A fuzzy analytical hierarchy methodology for the performance assessment of irrigation projects. Agricultural Water Management 121:113-123.

  • Montazar, A., Gaffari, A. (2012). An AHP model for crop planning within irrigation command areas. Irrigation and Drainage 61 (2):168-177.

  • Valipour, M, Montazar, A. (2012). Optimize of all effective infiltration parameters in furrow irrigation using Visual Basic and Genetic Algorithm Programming. Australian Journal of Basic and Applied Sciences, 6(6): 132-137.

  • Valipour, M, Montazar, A. (2012). Sensitive analysis of optimized infiltration parameters in SWDC model. Advances in Environmental Biology 6(9):2574-2581.

  • Valipour, M, Montazar, A. (2012).An Evaluation of SWDC and WinSRFR Models to Optimize of Infiltration Parameters in Furrow Irrigation. American Journal of Scientific Research 69:28-142.

  • Montazar, A. and Snyder, R.(2012). A multi-attribute preference model for optimal irrigated crop planning under water scarcity condition. Spanish Journal of Agricultural Research 10 (3):826-837.

  • Montazar, A. and Isapoor, S. (2012). Centralized downstream PI controllers for the west canal of Aghili irrigation district. Agricultural Science and Technology, Vol. 14:375-388.

  • Montazar A. Mohseni M. (2011). Optimizing wheat water productivity as affected by irrigation and fertilizer-nitrogen regimes in an arid environment. Agricultural Science 3(3):143-158.

  • Montazar, A., Azadegan, B. (2011). Effects of seasonal water use and applied N fertilizer on wheat water productivity indices. Irrigation and Drainage 61 (1): 52-59.

  • Montazar A., Mohsen M. (2011). Influence of supplemental irrigation and applied nitrogen on wheat productivity and yields. Agricultural Science 3 (1): 1: 78-90.

  • Isapoor, S., Montazar, A., van Overloop, P.J., van de Giesen, N. (2011). Designing and evaluation control systems of the Dez main canal. Irrigation and Drainage 60(1): 70-79.

  • Montazar, A. (2010). The influence of Stockosorb Polymer the advance time and infiltration parameters in short furrow. Applied Irrigation Science.

  • Montazar, A., Riazi, H., Behbahani, S.M. (2010). Conjunctive water use planning in an irrigation command area. Water Resources Management 24: 2817-2832.

  •  Montazar, A. (2010). Predicting alfalfa hay production as related to water distribution functions. Irrigation and Drainage 59: 189-202.

  • Montazar, A. (2010). Using simulation models to determine optimum water management practices. Applied Irrigation Science.

  • Montazar, A., Zadbeghar, E. (2010). An analytical hierarchy model for assessing global water productivity of irrigation networks in Iran. Water Resources Management 24: 577-596.

  • Montazar, A. (2009). Artificial neural network modeling to predict wheat yield production and water productivity. Applied Irrigation Science, 44 (2): 187-208.

  • Montazar, A., Riazi, H. (2008). Optimization of water allocation in Qazvin irrigation command area. Applied Irrigation Science, 43(2):132-141.

  • Montazar, A., Rahimikob, A. (2008). Optimal water productivity of irrigation networks in arid and semi-arid region. Irrigation and Drainage 57: 232-243.

  • Montazar, A. (2008). Modeling alfalfa hay yield as affected by applied water and irrigation uniformity. Applied Irrigation Science 43(1):14-24.

  • Montazar, A. (2008). Assessing soil moisture uniformity as affected by sprinkler water uniformity and bed slope. Applied Irrigation Science 43(1): 43-52.

  • Montazar, A., Sadeghi, M. (2008). Effects of applied water and sprinkler irrigation uniformity on alfalfa growth and hay yield. Agricultural Water Management 95: 1279-1287.

  • Montazar, A. (2007). Field assessment of soil moisture and crop yield distribution uniformity under sprinkler irrigation. Applied Irrigation Science. 42(2): 153-165.

  • Schahbazian, N., Eitzinger, J., Montazar, A., Akbari, G., Allahdadi, I. (2007). Using simulation models to improve irrigation water application. Pakistan Journal of Water Resources, Vol. 11 (2): 43-57.

  • Montazar, A., Mahboobi Fouladi, M. (2007). Water allocation to citrus trees based on age and stem collar circumference for trickle irrigation systems. Applied Irrigation Science 42(1): 61-75.

  • Montazar, A.,Moridnejad, M. (2007). Influence of wind and bed slope on water and soil moisture distribution in solid-set sprinkler irrigation systems. Irrigation and Drainage 57: 175-185.

  • Montazar, A., Behbahani, S.M. (2007). Development of an optimized irrigation system selection model using AHP. Biosystems Engineering 98 (2): 155-165.

  • Montazar, A., Kouchazadeh, S. (2006). The sensitivity analysis of baffle distributors. Journal of Applied Irrigation Science. 41(2): 273-290.

  • Montazar, A., Salehi Neyshabouri, A. (2006). Impacts of some parameters affecting the hydraulic performance of U-shaped side spillways. Canadian Journal of Civil Engineering 33: 552-560.

  • Kouchakzadeh, S. Montazar, A. (2005). Hydraulic sensitivity indicators for canal operation assessment. Irrigation and Drainage 54: 443-454.

  • Montazar, A., van Overloop, P.J., Brouwer, R. (2005). Centralized controller for the Narmada main canal. Irrigation and Drainage 54: 79-89.

Non-Peer Reviewed

  • Montazar. A., Cahn, M., Putman, A. (2019). A Preliminary Evaluation of Using Drip Irrigation in Organic Spinach Production. California Organic Farmer, August/September Issue, page 10-13. 

  • Montazar, A. (2019). Best Irrigation Management Practices in Date Palm (Part I). Agricultural Briefs-Imperial County, 22 (8): 149-151.

  • Montazar, A., Cahn, M., Putman, A.  (2019). Drip irrigation for California organic spinach: We gave it a try for the first time. UC ANR Knowledge Stream, August 26th, https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=31163.

  • Montazar, A. (2019). Enhancing California Date Palm Water Use Efficiency. California Fresh Fruits Magazine, September issue.  

  • Montazar, A. (2019). Best irrigation management practices in California date palm. UC ANR Knowledge Stream, September 30th, https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=31434.

  • Montazar. A., Cahn, M., Putman, A. (2019). Is Drip Irrigation A Potential Tool to Produce Organic Spinach and Manage Downy Mildew? Agricultural Briefs-Imperial County, 22 (6): 112-116.

  • Montazar, A. (2019). Preliminary Estimation of Dehydrator Onion Crop Water Needs in the Imperial Valley. Agricultural Briefs-Imperial County, 22 (7): 131-135.

  • Montazar. A., Cahn, M., Putman, A. (2019). Production of Organic Baby Spinach Using Drip Irrigation in the Low Desert. Agricultural Briefs-Imperial County, 22 (2): 18-24.

  • Montazar, A. (2019). Updated Alfalfa Crop Water Use Information: An Estimation for spring and summer Harvest Cycles in California Low Desert. Agricultural Briefs-Imperial County, 22 (11): 202-205.

  • Montazar, A., Kaffka, S. Bali, K., Bachie, O. 2018. How much water do sugar beets need in the Imperial Valley?  Agricultural Briefs-Imperial County, 21 (7): 107-110.

  • Montazar, A. 2018. Tailwater recovery system: simple or complex water management practice? Agricultural Briefs-Imperial County, 21 (5): 56-59.

  • Montazar, A. 2018. Is drip-irrigation a viable practice in the low desert region? Agricultural Briefs-Imperial County, January issue.

  • Montazar, A. 2018. Tools for irrigation management: Spatial CIMIS versus CIMIS data. Agricultural Briefs-Imperial County, February issue.

  • Montazar, A., Bali, K. 2018. How much water stress can olives take? California Fresh Fruit, March issue.

  • Montazar, A. 2018. Basic principles to attain the most effective use of irrigation water. Agricultural Briefs-Imperial County, 21(6): 94-98.

  • Montazar, A. 2018. How much water is needed to produce a sunflower crop (a potential low water use crop) in the low desert. Agricultural Briefs-Imperial County, 21 (9): 144-148. 

  • Kaffka, S. R., Bali, K., Bachie, O., Montazar, A. (2018).  Comparison of surface furrow and subsurface drip irrigation systems in the Imperial Valley for root yield and quality, water use and susceptibility to late-season root rots.  Proc. Of the 76th Summer Congress of the International Inst. Of Sugar Beet Res., Deauville France. June 5-7. 

  • Gull, U., Bali, K., Montazar, A., Putnam, D. (2018). Quantifying water productivity, forage quality and yield of Medicago sativa L. (alfalfa) under subsurface drip irrigation (SDI). California Plant and soil conference, Agronomy Society of Agronomy, February 6-7, Fresno, CA.

  • Gull, U., Bali, K., Montazar, A., Putnam, D. (2018). Implications of using subsurface drip irrigation for increasing water productivity, forage yield and quality of Medicago sativa L. (alfalfa) under a Mediterranean Climate. North American Alfalfa Improvement Conference, June 4-6, Logan, Utah.

  • Radawich, J., Montazar, A., Zaccaria, D., Putnam, D. (2018). Examining varieties adapted to drought conditions under subsurface drip irrigation. North American Alfalfa Improvement Conference. June 4-6, Logan, Utah.

  • Montazar, A., Bali. K. 2018. A preliminary estimate of olive crop water use in the Imperial Valley.  Agricultural Briefs-Imperial County, 21 (3): 37-40.

  • Montazar, A. (2018). Agricultural Drainage in arid and Semi-arid Regions. Agricultural Briefs-Imperial County, 21 (11): 172-175.

  • Montazar, A. (2018). An introduction on sustainable agriculture research and education (SARE) program. Agricultural Briefs-Imperial County, 21 (6): 91-93.

  • Radawich, J., Montazar, A., Zaccaria, D., Putnam, D. (2018). Deficit irrigation strategies for SDI-irrigated alfalfa varieties. California Plant and soil conference, Agronomy Society of Agronomy, February 6-7, Fresno, CA.

  • Montazar, A. (2018). How much water is needed to produce a sunflower crop (a potential low water use crop) in the low desert. Agricultural Briefs-Imperial County, 21 (9): 144-148.

  • Montazar, A. (2017-2018). Imperial Valley CIMIS report and UC water management resources, Agricultural Briefs-Imperial County, issues of October 2017 through September 2018.

  • Montazar, A. (2018). UCCE Agronomic Crops and Irrigation Water Management Field Day / Workshop. Agricultural Briefs-Imperial County, 21 (5): 73-79.

  • Montazar, A., Bali, K., Zaccaria, D., Putnam, D. (2018). Viability of Subsurface Drip Irrigation for Alfalfa Production in the Low Desert of California. ASABE International Meeting, July 29-August 1, Detroit, Michigan.

  • Montazar, A. (2018). What we need to know about state water efficiency and enhancement program (SWEEP) fund. Agricultural Briefs-Imperial County, 21 (8): 129-130.

  • Montazar, A., Bali, K. 2017. Subsurface drip irrigation in alfalfa, California Dairy Magazine, August issue.

  • Bachie, O., Devkota, P., Montazar, A., Diaz, J. 2017. Preliminary results of Imperial Valley growers needs assessment survey, Agricultural Briefs-Imperial County, September issue.

  • Montazar, A. 2017. Effective solution for improving on-farm irrigation efficiency. Agricultural Briefs-Imperial County, November issue.

  • Montazar, A. 2017. Partial - season irrigation as an effective water management strategy in alfalfa. Agricultural Briefs-Imperial County, October issue.

  • Montazar, A. 2017. Effective water management practices for alfalfa, Agricultural Briefs-Imperial County, September issue.

  • Montazar, A. 2017. Effective water management practices in alfalfa, California Dairy Magazine, October issue.

  • Montazar, A. 2017. Salinity issue and management practices in the low desert region. Agricultural Briefs-Imperial County, December issue.

  • Montazar, A., Bali, K. 2017. Subsurface drip irrigation in alfalfa: advantages and disadvantages, Agricultural Briefs-Imperial County, July issue.

  • Putnam, D., Montazar, A., Zaccaria, D., Kisekka, I., Bali, K. (2017). Agronomic practices for sustainable drip irrigation in alfalfa. Western alfalfa and forage symposium, November 28-30, Reno, NV.

  • Montazar, A. (2017). New irrigation and water management advisor in the low desert region. Imperial Valley Press, July 5th. 

  • Montazar, A. (2017). Sub-surface drip irrigation. Imperil Valley Press. August, 11. 

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