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<br />nAY-31-94 TUE 15:55 <br /> <br />P,16 <br /> <br />, <br />..... ni' <br />{\()l:,,)u <br /> <br />should provide the user with the capability to estimate consumptive use for: multiple years or single <br />years. The consumptive use model will operate using an ASCII Input Ille. <br /> <br />SubtQ.~1c 2. Develop and test DM! software to link the consumptive use model with the databases, <br />This subtalk includes the portions of tbe DMI needed to support the protutype system fur the <br />GunnIson RIver basin and identifies requirements for interaction with Tasks 1.06, 1.07. 1.08, and <br />l.l O. The DMI design will be based on the standards developed in Task J.O~. The DMI will be <br />designed to retrieve from the databases the consumptive use input requirements that were. developed <br />in Phase I (see Task MelJ!.ol'lllldnm L14-2), as well as any additional inputs identified in Phase lIa. <br />The data that ate retrieved using the DM! will be written to an ASCll "f1.at file"thal wiD be the input <br />tn the consumptive use model. <br /> <br />Suht..~k 3. Design and develop the Gm for the consumptive use component. This subtn:;k includes <br />the development of software to allow the user to run the model interactively as well as display results <br />of the model. The model inrorface wlll be form- and menu-based to allow the user to view and <br />modify any input data and make selections regarding options such as: time period, type of <br />consumptive use equation, or lucation, <br /> <br />Suhtask 4, Develop a Users' Manual for the consumptive use model. Development of this document <br />will he coordinated willl Task 1.17 to be consistent with otber documentation efforts. <br /> <br />Subta.<k 5, Revise and enhance a model for the calculation of agricultural consumptive use using a <br />monlhly time step. The xecummendation based On the evaluation of the dilTerent models (see Task <br />Memoranda 1.14-4 and 1.14-5 for a de:scription of the models excluded and models included in the <br />short list) is to use the XCON2 mooclthe USBR has developed for the SCS Blaney-Criddle method <br />and incorporate some of the chnnge.~ proposed to the USBR methods manual. In Phase 1111, XCONS2 <br />and parts of 5MB will be incorporated into the CROSS. Based on the recommendaliODS to the <br />USBR report (see Appendix C) me following actions wllllJe taken; <br /> <br />. Compute the amolwt and type of irrigated acreage using the spatial database <br />coverages for the Gunnison River ba.~in, This will provide an improved irrigated <br />acreage estimate to be lIsed in the calculations. <br /> <br />. Compute the amount of irrigated acreage for which the total irrigation <br />requirements are not applied, this acreage is an important component in <br />ealculaling the amount of irrigation and is mlica\ to e:stimate the amount of <br />irrigation water requirements. Four to seven diversion Slroetures will be <br />identified, and the diversion record will be studied to evaluate the actual time <br />when the crops are not receiving a fuU supply of water, The purpose of this <br />evaluation is to determine if the USBR cutoff date:s for the delivel)' of water to <br />the crops that do not receive the total irrigation wquiromcntliIe IYlpropriate or if <br />recommendations for new cutoff dates are necessary. No freld worle is expected <br />to be conducted as part of this effort, Where necessary, i1Tigation efficiency and <br />canal loss values generated from previous studies or numbers bllSed on <br />engi ""ering judgment will be used as part of the analysis. This task will depend <br /> <br />..,. .w... 2-47 <br />