Laserfiche WebLink
<br />ensure that the proper delivery is made, The system has demonstrated to be <br />effective in this area. <br /> <br />The utility of the system in the administration of interstate compacts is <br />an especially important application. The State Engineer has the responsi- <br />bility to deliver defined amounts of water under the terms of the various <br />interstate compacts, but not to over-deliver and deprive Colorado of its <br />entitlement. Fifteen stations incorporated in the statewide monitoring <br />network are utilized for the effective administration of these interstate <br />compacts. <br /> <br />The majority of the large, senior water rights in Colorado belong to <br />irrigation companies. These rights are often the calling right in the <br />administration of a water district. The direct diversion rights exercised can <br />affect significantly the hydrology of the river. Twenty-one major irrigation <br />diversions are monitored by the system. <br /> <br />Recently, water rights have been acquired by federal and state agencies <br />to guarantee minimum streamflow for both the recreational and fisheries <br />benefits. The availability of real-time data is essential in assuring that <br />these minimum streamflows are maintained. <br /> <br />B., Hydrologic Records Development <br /> <br />Specialized software programs provide for the processing of raw hydro- <br />1 ogi cdata on a real-time basis. Conversions such as stage-discharge <br />relationships and shift applications are performed on a real-time basis as the <br />data transmissions are received. Mean daily values are computed automatically <br />each day for the previous day. Data values that fall outside of user defined <br />normal or expected ranges are flagged appropriately. Flagged data values are <br />not utilized in computing mean daily values. Missing values can be added and <br />invalid data values corrected by the respective hydrographer for that station <br />using data editing functions. The records development software was signi- <br />f~cantly modified to allow for progressive records development. Computations <br />are carried out by the computer alleviating the chance for human error. <br /> <br />Data can be retrieved and displayed in various formats including the <br />standardized U. S. Geological Survey-Water Resources Division annual report <br />format adopted by the Colorado Division of Water Resources for publication <br />purposes. An advantage of real-time hydrologic data collection is in being <br />able to monitor the station for on-going valid data collection. If a sensor <br />or recorder fails, the hydrographer is immediately aware of the problem and <br />can take corrective action before losing a significant amount of data. <br /> <br />It is essential to understand that real-time records can be different <br />from the final record for a given station. This can be the result of editing <br />raw data values because of sensor calibration errors, sensor malfunctions, <br />analog-to-digital conversion errors, or parity errors. Discharge conversions <br />can be modified by the entering of more current rating tables and shifts. <br />Corrections to the data are sometimes necessary to compensate for hydrologic <br />effects such as icing. Human error can also result in invalid data. The <br /> <br />-52- <br />