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<br />I <br /> <br />II <br /> <br />PART IV. <br /> <br />PART V. <br /> <br />. <br /> <br />. <br /> <br />I, <br /> <br />. <br /> <br />TABLE OF CONTENTS (Continued) <br /> <br />PROBLEMS OF THE AREA . <br /> <br />A. <br />B. <br />C. <br /> <br />Maintenance of DrainaGe <br />Conservation of Water <br />Water Supply to Mexico. <br /> <br />on Irrigation Projects. <br /> <br />l. Quantity. <br />2. Quality. <br /> <br />PRESENT INVESTIGATIONS. <br /> <br />A. <br />B. <br /> <br />General Considerations. <br />Ground 'dater Geology - Wellton-l1ohawl< Area. <br /> <br />l. Definition of the Wellton-Mohawk Aquifer. <br /> <br />a. Gravel Zone . <br />b. Sandy Zone. . <br />c. Wellton Mesa. <br /> <br />2. Hydraulic Characteristics <br />3. Ground Water in Storage . <br />4. Water ,Table Trends and Depths <br />5. Quality of Ground Water . <br /> <br />C. <br /> <br />Hydrology of the Wellton-Mohawk Area. <br /> <br />PaGe <br /> <br />36 <br /> <br />36 <br />36 <br />37 <br /> <br />37 <br />38 <br /> <br />39 <br /> <br />39 <br />40 <br /> <br />42 <br /> <br />42 <br />43 <br />43 <br /> <br />43 <br />44 <br />45 <br />46 <br /> <br />47 <br /> <br />l. 1-1ater Supply and Requirements . 47 <br />2. Projected Improvement in Quality of Ground Water. 5l <br /> <br />D. <br /> <br />Soils Investigations. <br /> <br />l. United States . . <br /> <br />a. Previous Soil Surveys <br />b. Present Soil Studies. <br /> <br />2. Mexico. . <br /> <br />. . .. .. .. .. .. <br /> <br />a. Field Investigations. <br />b. Land Categories . . . <br />c. Laboratory Characterization of the Soils. <br />d. Relationship between Water Quality and Soils. <br /> <br />E. <br /> <br />Pipe Drainage Investigations. . . .. ....... <br /> <br />xi <br /> <br />54 <br /> <br />54 <br /> <br />54 <br />58 <br /> <br />60 <br /> <br />60 <br />60 <br />66 <br />73 <br /> <br />79 <br />