3 results about "Rating curve" patented technology

The invention discloses a monthly ecological base flow calculation method for an iced river in a semi-arid region, which comprises the following steps: on the basis of river section geometry and wetted weekly response, coupling habitat water demand depth constraints of typical aquatic organisms in different periods, and reversely deducing flow in combination with a long-term hydrological sequence and a monthly rating curve, so as to calculate the monthly ecological base flow of the iced river in the semi-arid region. An ecological base flow sequence which can be output monthly, explained and reproducible is formed, and an independent processing scheme is provided especially for the problem of water level-flow relation distortion in the freezing period; the invention relates to the technical field of ecological hydrology and river ecological restoration. According to the monthly ecological base flow calculation method for the frozen river in the semi-arid region, the biological water demand is upgraded to a staging-monthly threshold value H2 (m) from an annual single threshold value, so that migratory species are prevented from generating unreasonable constraints on non-resident months, and the ecological suitability is improved; the flow is reversely deduced according to the monthly rating curve in the non-freezing period, the system deviation of converting the month difference into the water level difference is reduced, and the reverse deducing precision and the monthly scale availability are improved.

A method for estimating stream flow data of a channel includes steps of acquiring direct measurement of an index velocity of the channel, acquiring stage measurements for the channel for use in determining slope of a free surface, and applying a data-driven model combining the index velocity and a continuous slope-area method which uses the slope of the free surface to estimate stream flow data of the channel without using conventional rating curves. The direct measurement of the index velocity and the stage measurements may be received at a computing device executing instructions for applying the data-driven model.

The application discloses a kind of semi-arid region frozen river monthly ecological base flow calculation method, with river section geometry and wet week response as basis, coupling typical aquatic organism habitat water depth constraint in different periods, and combining long-term hydrological sequence and monthly rating curve back propagation flow, form monthly output, explainable, reproducible ecological base flow sequence, especially for frozen period water level-flow relationship distorted problem gives independent processing scheme;The application relates to the field of ecological hydrology and river ecological restoration technology.Semi-arid region frozen river monthly ecological base flow calculation method, biological water requirement is upgraded from single threshold to stage-month threshold H2 (m) throughout the year, avoid unreasonable constraints on non-resident months for migratory species, improve ecological suitability;Non-frozen period uses monthly rating curve back propagation flow, reduce the system deviation that month difference is regarded as water level difference, improve back propagation accuracy and month scale availability.