Software Benefits
for Discharge Measurement
and Rating Curve Development.
BIBER and SKED
for Data Quality without Compromise.

BIBER and SKED

Water Resources Management

BIBER allows discharge measurements to be recorded directly on site. Any available measurement reports on completed flow measurements or measurement results can be entered into BIBER through a wizard-supported manual entry system. Evaluations of discharge measurements in compliance with the German “Pegelvorschrift” (German Manual for Water Level Gauging and Discharge Measurements) and other international standards can be carried out within the BIBER framework. Evaluation results are presented concisely and, where appropriate, graphically. Additional information and comments are also available to complement the flow characteristics, such as water level, flow, hydraulic radius or the profile value.

The most important flow measurement evaluation results are available to you in SKED for further analysis. A homogeneous data collective can be generated using a powerful filter, and an outflow curve can then be created through regression analysis on the basis of the resulting data. Your rating curves, generated according to arbitrary parameter conversions, can be managed in SKED.

Since rating curves are managed in versions, you will never lose track of any rating curves used in the past. As an expert tool, SKED offers comprehensive functions and wizards for the analysis of flow measurements, the setup of flow curves and the determination of validity. All conventional international rating curve types can be used in SKED. Furthermore, SKED offers tools to examine the quality of the generated rating curves. When used in conjunction with our WISKI water management system, rating curves and validities generated in SKED can be used to directly translate your water level values into discharge values.

Evaluation procedures in BIBER

BIBER can provide gaugings of velocity measurements as well as various evaluations in graphical form. Three procedures are available to determine the gaugings of a velocity measurement: Discharges from the partial cross-section are displayed for all evaluation procedures, and individual verticals may be excluded from the evaluation.

BIBER offers the following graphical evaluations:

BIBER device manager

The BIBER device manager facilitates clear and simple management of sensors, current meters and their calibration equations as well as counters. You can configure your current meter from a selection of propellers, current meter bodies and centre pieces. Simply enter your calibration equations and leave the continuity control to BIBER. As well as NAUTILUS (by OTT) and FLO-MATE (by Marsh McBirney) sensors, BIBER is able to configure and manage sensors from any manufacturer.

SKED direct measurement access

SKED has full access to BIBER measurements. You can search for the appropriate selection of measurements needed to generate your rating curve by filtering on Filter criteria can be sequentially applied and combined as necessary to derive the appropriate data set. Changes in the stage-discharge relationship are easily recognised using cross-profiles. You can also blend in dry and/or wet profiles of the measurement.

SKED analysis procedures

Let SKED do the calculations. You can set regression ranges (bordering or overlapping) and select an appropriate regression process for each area. Select from: You can blend in the confidence interval for each segment and exclude single or multiple measurements from the regression.

The regression range can be graphically altered, and the regression will be updated immediately. Saving previous regression attempts improves the basis for comparison. You can go back a step at any time. Areas that are only sparsely populated with measured data can be supplemented using construction points. Construction points influence regression just like actual measurements, but are clearly marked as construction points. You can choose between two forcing points to influence your regression results: one for high water and one for low water ranges.

SKED rating curve procedure

For standard cross sections following the power law, appropriate regressions can be applied as a rating curve at the push of a button. Natural cross sections, in certain circumstances influenced by aquatic growth, show an irregular distribution of measurements. Here, regression is often only appropriate as a suggestion. The rating curve itself is constructed manually. You can graphically insert any number of descriptor points, and SKED will connect them linearly or through a spine curve. The descriptor points can be moved individually to precisely construct your rating curve.

Confidence intervals can be statistically calculated as a deduction from the rating curve and displayed as a plausibility check for each rating curve version. Velocities of flow, as well as wet and dry profiles, can be displayed and calculated and product analyses of individual regression curves (e.g. median flow cross section and median speed) can be carried out.

Similarly, you can display large deviations from the measured values in comparison with the rating curve. You can preview the relevant flow time series before your rating curve is released for flow calculation.