The instructions for performing a standard stage discharge computation, which uses a rating which defines the relationship between stage and discharge. The pointer to the data descriptor defining the stage gage. The instructions for performing a computation of discharge unit values where slope is a factor. This computation uses the fall in water surface between two gages. The pointer to the data descriptor defining the base gage. The pointer to the data descriptor defining the auxilliary gage. The flag indicating whether the base gage is upstream from the auxiliary gage. If true the base gage is upstream from the auxiliary gage and if false the auxiliary gage is upstream from the base gage. This flag is used in the time-series computation of stream flow at a slope station and indicates how the gage-height records should be subtracted from one another to compute the fall of the water's surface. The value indicating the lowest gage height where slope is a factor in the slope-discharge time-series computation. Gage height below this value will use a standard rating computation. This value is expressed in the units of the base gage. The value indicating the highest gage height where slope is a factor in the slope-discharge time-series computation. Gage height above this value will use a standard rating computation. This value is expressed in the units of the base gage. The value indicating the highest value of fall between the base and auxiliary gage heights where slope is a factor in Fall values above this value will use a standard rating computation. This value is expressed in the units of the base gage. The base slope datum is a correction that is added to the measured fall during the slope discharge computation. This value is used to "equalize" the base and auxiliary gage data and is expressed in the units of the base gage parameter. The instructions for performing a computation of discharge unit values where velocity is a factor. This computation uses stage to compute cross-sectiona area and velocity and area to compute discharge. The pointer to the data descriptor defining the stage unit values. The pointer to the data descriptor defining the velocity unit values. The value indicating the lowest gage height where velocity is a factor in the velocity-discharge time-series computation. Gage heights below this value will use a standard rating computation. This value is expressed in the units of the gage height. The value indicating the highest gage height where velocity is a factor in the velocity-discharge time-series computation. Gage heights above this value will use a standard rating computation. This value is expressed in the units of the gage height. "Y"/"N" Flag indicating the use of the regression equation "mean_velocity = X*Vi + Y*Stage*Vi + C" instead of the rating table. Correlation coefficient for velocity value for computing a mean adjusted velocity for a velocity-discharge computation. Correlation coefficient for stage value for computing a mean adjusted velocity for a velocity-discharge computation. Constant value for computing a mean adjusted velocity for a velocity-discharge computation. The RainfallDischarge element defines the information needed to compute rainfall unit values using a differencing method. The value indicating the minimum rainfall threshold where a smaller rainfall value is considered measurement noise and is set to zero in the rainfall unit values computation. This value is expressed in the units of the rainfall parameter. The value of the threshold where the difference between the first rain gage and last rain gage reading for a single day is not exceeded. This means that there was effectively no rainfall and any reading for the day is just sampling noise. Values for the day are set to zero. The threshold is considered to be in the units of the rainfall parameter. The value of the water level in a rain gage where the drain siphon takes effect. The threshold is considered to be in the units of the rainfall parameter. A computation where no unit values are computed. A computation where unit values for a data descriptor are computed from unit values of an input data descriptor using a rating. The pointer to the data descriptor defining the input gage. The instructions for performing the unit values computation. The instructions for performing the daily values computation. The code identifying the statistic to compute. The instructions for performing the time-series computations. The effective starting date and time of the time-series computation instruction set. The effective ending date and time of the time-series computation instruction set. The code indicating the type of unit values computation to be performed. The time in minutes between consecutive unit values that defines a gap of missing unit values. This time is used to flag daily values as incomplete when they are calculated from unit values that have this gap exceeded. It is also used for deciding whether to interpolate unit values during UV computations and midnight calculations. A true or false flag indicating the type of time-series computation primary report to be generated during primary computations is to be the standard primary report. "Y" indicates that the standard report shall be generated and "N" indicates that the historical primary report will be generated. The base discharge used in the peakflow computation. The interval between peaks value. A true or false flag indicating theis there are site visit shifts.