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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />2458 <br /> <br />TABLE OF CONTENTS <br />TASK A REPORT <br />ON-FARM WATER REQUIREMENTS <br /> <br />Page <br /> <br />SECTION A-I NET CROP WATER REQUIREMENTS <br />1.1 INTRODUCTION <br /> <br />1-1 <br /> <br />1.1.1 Purpose and Scope <br /> <br />1-1 <br /> <br />1.1.2 Location and Climate <br /> <br />1-1 <br /> <br />1.1.3 Definition of Terms <br /> <br />1-2 <br /> <br />1.2 CURRENT RESEARCH <br /> <br />1-2 <br /> <br />1.2.1 Navajo Indian Irrigation Project <br /> <br />1-4 <br /> <br />1.2.2 Farmington Experiment Station <br /> <br />1-5 <br /> <br />1.2.3 Cortez Experiment Station <br /> <br />1-6 <br /> <br />1.3 BASIC CONSUMPTIVE USE METHODOLOGY <br /> <br />1-7 <br /> <br />1.3.1 General Approach <br /> <br />1-7 <br /> <br />1.3.2 Review of Evapotranspiration Methods <br /> <br />1-13 <br /> <br />1.3.3 Temperature Methods <br />SCS Modified Blaney-Criddle <br />FAO Modified Blaney-Criddle <br /> <br />1-13 <br />1-14 <br />1-14 <br /> <br />1.3.4 Radiation Methods <br />Jensen-Haise <br />FAO Radiation <br /> <br />1-15 <br />1-15 <br />1-17 <br /> <br />1.3.5 Combination Methods <br /> <br />1-17 <br /> <br />1.3.6 General Comparison of Methods <br /> <br />1-18 <br /> <br />1.4 APPLICATION TO PROJECT AREA <br /> <br />1-22 <br /> <br />1. 4.1 General <br /> <br />1-22 <br /> <br />1.4.2 Sample Project Calculations <br /> <br />1-24 <br /> <br />.. <br /> <br />Temperature Methods: <br />SCS Modified Blaney-Criddle <br />FAO Modified Blaney-Criddle <br /> <br />1-24 <br />1-27 <br /> <br />1 <br />