EngineeringWaterCodeStudiesSP (2)

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3 From an engineering standpoint the problem is one of "systems analysis." As in any system, whether it be mechanical, electrical, or hydrogeological, it can be considered in three parts: (1) inputs and/or withdrawals of energy, matter, etc.; affecting (2) a system of interrelated and interacting elements to (3) produce responses which are of interest. In a hydrogeological system, there are inputs and withdrawals of water which vary both in time and loca- tion, and are the results of both natural and man-made conditions. The pre- dictability of the inputs and withdrawals is dependent upon many factors and must be considered in terms of a probability based upon historical exper- ience rather than a set figure. The pertinent elements of the system include hydraulic and geometric characteristics of the groundwater-surface water system which affect the location and movement of water in the system. Responses of the system which are of interest include changes in groundwater levels and interchange of water between the aquifer and the stream. GENERAL SUMMARY OF FINDINGS, C;JNCLUS IONS, AND RECOMMENDA nONS Based upon the detailed studies which have been made during the last year under authority of Senate Bill 407, certain findings, conclusions, and recommendations stand out as being particularly pertinent, These are set forth below. Findinqs 1. The average annual water supply within the South Platte River Basin is adequate to meet present requirements. However, because of the wide fluctuations in runoff, the distribution of water availability is far from satisfactory. 2. The groundwater reservoir along the main stem of the South Platte River between Denver and the State line contains approximately ten million acre-feet of water. Only a small percentage of this capacity is utilized and this only in a haphazard and unplanned way. 3. Groundwater pumping and transmountain importations have been major factors in stabilizing water supplies in the South Platte Basin. However, the pumping of groundwater has caused infringement upon prior surface water rights. Studies indicate that this infringement is not as severe as many have felt it to be. 4. The water supplies of the South Platte Basin are not being utilized or administered as efficiently and effectively as they could be. 5. Deficiencies exist ~ the completeness and accuracy of water use records.