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3. Evaporation rates for each month for all reservoirs 4. Maximum and minimum reservoir constraints 5. Maximum and minimum outlet limitations 6. Initial reservoir content and salinity Demand Data Varying levels of basin development may be studied by modifying the demand data base. The demand -data base contains characteristics of each demand and allows for a breakdown of a demand into 10 water users. Since there may be up to 10 demands per reach, it is possible to have as many as 100 users per reach. The de- mand data base is not input to the model di- rectly but is input to the SMDID (Simulation Model Demand Input Data) program. With the demand data base as input, SMDID generates the demand data for CRSM. SMDID not only generates the demand data but also produces summaries of projected depletion by water use (i.e., irrigation, M&I, power, etc.), State, and basin. These summaries provide a useful for- mat for documenting the Level of development modeled by a particular run of CRSM. Hydrology Data The hydrology data input to CRSM is gener- ated by running the program MHYDRO with the hydrology data base and control data as in- put. The hydrology data base contains calcu- lated natural flow and salt and natural reach gains and losses of flow and salt from 1906 to 1978; natural is defined for this purpose as historical data adjusted for human develop- ment. This adjustment is made to estimate what the flows would be without present devel- opment on the river. The data for this data base were developed from historical stream- flow records, climatological records, cropped acreages, calculated evaporation from reser- voirs, and recorded diversions and return flows. The data base has been developed for the periods 1906-1978 and will be extended peri- odically. The program MHYDRO not only generates the hydrology data for CRSM but also may produce tables, correlations, plots, and other reports at the option of the user. MHYDRO also performs the updating of -the hydrology data base.. With most applications of the CRSS, it is im- portant to evaluate the reaction of the system to high and low runoff periods coupled with dif- ferent periods of development. This evaluation is currently performed by making several runs. With each run, the beginning yeaz of the hydrol- ogy is shifted ahead "n" years. For example, if the model run were to be from 1981 to 2030 and "n" was set equal to 5, the first run would begin with 1981 using the 1906 hydrology, 1982 using the 1907 hydrology, etc. The second run would begin with 1981 using the 1911 hydrology and so on. Shifing the beginning yeaz by "n" years each run and placing the eazlier years to the tail end of the hydrology allows for 73 divided by n model runs to be evaluated. Tapedit (Output Summary Program) The TAPEDIT program was developed to save both manpower and computer resources. With TAPEDIT, the user may select certain param- eters to be summarized in either tabulaz or 10