Flood discharge calculation system

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last updated：Mar 22, 2023

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Hydraulic calculation software for spillways in accordance with land improvement "pond maintenance." Examination of overflow sections, transition sections, and discharge channels considering 200-year probability rainfall and storage effects.

We will perform hydraulic calculations for the flood discharge in accordance with land improvement "pond maintenance." The structural types that can be considered include "inflow type," "overflow weir," and "side channel type," as well as the "labyrinth weir." The analysis will compare the flow rates of A, C, and B items based on a 200-year probability rainfall, and will include calculations for "approach channel," "regulation section," "transition section," and "discharge channel." Additionally, the design of energy dissipation structures for a 100-year probability rainfall can also be studied (indirect inflow is also possible). The calculation report will include hydraulic calculation documents, water surface tracking calculation tables, change point tables, and hydro/hyeto graphs, which can be displayed on a preview screen and output in Word format.

Related Link - http://www.sipc.co.jp

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basic information

- Hydraulic calculations for the flood discharge and side walls (freeboard height) will be conducted in accordance with the "Guidelines for Land Improvement Project Design: Maintenance of Reservoirs." - The analysis includes calculations of design flood volume based on a 200-year probability rainfall intensity and calculations for the flood discharge's "approach channel, adjustment section, transition section, and discharge channel." - The "energy dissipation structure" section is calculated using a 100-year probability rainfall intensity. - In determining the design flood flow rate, the flow rates for sections A, B, and C are calculated and compared before deciding on the design flood flow rate. It is also possible to specify a direct design flood volume. - Consideration can be given to the design flood volume of indirect watersheds (flow rates based on constant flow or rainfall intensity formulas) and the retention effects. - Calculation results will be displayed sequentially on the screen, and comparisons can be made by varying "weir height and width" and "design head and weir height" against the design flood flow rate. - Output documents include hydraulic calculation reports, water surface tracking lists, change point tables, hydrographs/height graphs, which can be previewed and printed. Word output is also possible. - For the transition and discharge sections, calculations will be performed considering changes in cross-sectional shape using the "Unequal Flow Channel Water Surface Tracking Calculation System" and losses other than friction losses (such as curvature), with the possibility of integration with this system.

Price information

¥341,000 (HASP method + tax included)

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Applications/Examples of results

Standards and Specifications Guidelines for Land Improvement Project Design "Pond Maintenance" (May 2015) Ministry of Agriculture, Forestry and Fisheries, Construction Department, Bureau of Structural Improvement Design Standards for Land Improvement Projects "Waterway Works"