Allan A. Andales

Associate Professor and Extension Specialist - Irrigation and Water Science

Department of Soil and Crop Sciences
Colorado State University
1170 Campus Delivery
Fort Collins, CO 80523-1170
(970) 491-​6516

Dr. Allan Andales applies principles of soil and water engineering, environmental biophysics, and numerical methods to study the effects of management practices and environmental factors on field hydrology and agricultural production. He is calibrating and validating the Decision Support System for Agrotechnology Transfer (DSSAT) cropping system model for the Ogallala Aquifer Region (OAR) in Eastern Colorado. Along with collaborators in neighboring States overlying the OAR, he will use DSSAT to simulate long-​term crop evapotranspiration (ET) and yields under various irrigation management scenarios. The simulated ET will be used in regional-​scale hydrology models to estimate impacts of irrigation management on water supplies in the Ogallala Aquifer. Dr. Andales is also working with OAR collaborators to develop user-​friendly irrigation scheduling tools for farmers in the OAR.

Collaboration with computer modelers and digital tool developers in the OAR will result in new methods for linking field-​scale models with regional-​scale models to identify water management strategies that can optimize groundwater use and sustain irrigated food production in the OAR. It is also anticipated that widespread use of irrigation scheduling tools in the OAR will lead to water conservation and reduced transport of agricultural chemicals into the aquifer and surface water bodies.


Water Irrigation Scheduler for Efficient Application


Webinar: “Getting WISE: new irrigation scheduling app from CSU”

Selected Publications

Subedi, A., Chávez, J.L., Andales, A.A. 2016. ASCE-​EWRI Standardized Penman-​Monteith Evapotranspiration (ET) Equation Performance in Southeastern Colorado. Agricultural Water Management (In Press; accepted 6/​30/​2016). http://​dx​.doi​.org/​1​0​.​1​0​1​6​/​j​.​a​g​w​a​t​.​2​0​1​6​.​0​7​.​002

Mkhwanazi, M., Chávez, J.L., Andales, A.A. 2015. SEBAL-​A: A remote sensing ET algorithm that accounts for advection with limited data. Part I: Development and validation. Remote Sensing 7:15046-15067. DOI:10.3390/rs71115046

Bartlett, A.C., Andales A.A., Arabi, M., Bauder, T.A. 2015. A Smartphone App to Extend Use of a Cloud-​based Irrigation Scheduling Tool. Computers and Electronics in Agriculture 111:127-130.

Saseendran, S.A., Trout, T.J., Ahuja, L.R., Ma, L., McMaster, G.S., Nielsen, D.C., Andales, A.A., Chávez, J.L., and Ham, J.M. 2015. Quantifying crop water stress factors from soil water measurements in a limited irrigation experiment. Agricultural Systems 137:191-205. doi:10.1016/j.agsy.2014.11.005

Andales, A.A., Bauder, T.A., and Arabi, M. 2014. A Mobile Irrigation Water Management System Using a Collaborative GIS and Weather Station Networks. In: Practical Applications of Agricultural System Models to Optimize the Use of Limited Water (Ahuja, L.R., Ma, L., Lascano, R.; Eds.), Advances in Agricultural Systems Modeling, Volume 5. ASA-​CSSA-​SSSA, Madison, Wisconsin, pp. 53-84.

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