Technologies and Methods to Aid the Adoption of PHAUCET Irrigation in the Mississippi Delta

Author(s): Powers, S.

Conservation is one of the keys to balancing the water budget of the Mississippi Delta's Alluvial Aquifer. As more and more farmed acres in the Delta are being irrigated every year, the use of new and existing conservation practices in the application of that water is imperative. While high value, expensive projects such as the installation of surface water reservoirs and tail water recovery systems demonstrate great groundwater savings potential, there are many other sensible and more economic ways to conserve the Delta's water resources. Among those options is the use of the PHAUCET Irrigation Program. PHAUCET is a computer program originally written by the USDA-NRCS for use with furrow irrigation of row crops using poly pipe. Its primary function is to generate a range of hole sizes for each irrigating set that will increase the uniformity of each round of irrigation. This increased uniformity allows irrigators to more accurately time irrigations, leading to a more easily managed irrigation cycle. With the PHAUCET Program, however, there are a number of variables users must input in order for the program to generate its suggested hole sizes. These variables include the flow rate of the well, hole spacing along the poly pipe, the elevation changes of the poly pipe, poly pipe size, the number of holes for each watered furrow, set lengths, and row lengths. While most of these variables are known to growers, three of them can be more difficult to obtain. Flow rates, elevation changes, and row lengths can all three present problems to growers when they are working to implement the program. This paper will look at different technologies and methods that have the potential to aid users in the collection and use of the lesser known variables.
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Technical Sessions

1 Best Management Practices #1
2 Delta Water Assessment
3 Flood Assessment & Mgmt.
4 Wetlands
5 Watershed Mgmt. #1
6 Non-Point Source Assessment
7 Modeling
8 Water Quality
9 Best Mgt. Practices #2
10 Delta Water Conservation
11 Sedimentation
12 Storm Water
13 Watershed Mgt. #2
14 Public Water Systems
15 Surface Water Assessment & Evaluation

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