China Three Gorges has patented a method for ecological modulation in main stream reservoirs, considering water from interval tributaries. The method involves determining contribution ratios, river routing, and ecological modulation modes based on hydrological data to optimize high-flow surge frequencies in spawning grounds. GlobalData’s report on China Three Gorges gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on China Three Gorges, AI assisted CAD was a key innovation area identified from patents. China Three Gorges's grant share as of January 2024 was 57%. Grant share is based on the ratio of number of grants to total number of patents.

Main stream reservoir ecological modulation method

Source: United States Patent and Trademark Office (USPTO). Credit: China Three Gorges Corp

A recently granted patent (Publication Number: US11866897B2) outlines a method for ecological modulation of main stream reservoirs that takes into account incoming water from interval tributaries. The method involves a series of steps, including determining the contribution ratio of incoming water from tributaries to the first-day's water rising in a high-flow surge process and deciding when to start ecological modulations of spawning ground sections. This determination is based on various ecological and hydrological parameters of the target fish's spawning grounds, as well as the analysis of hydrological runoff data from tributaries. The patent also details a river course routing method after the main stream and its tributaries join, as well as a high-flow surge frequency simulation model for spawning ground sections to maximize artificial high-flow surge frequency.

Furthermore, the patent specifies the criteria for judging the starting time for ecological modulations based on water rising processes and incoming water from tributaries. The method aims to meet the requirements of the high-flow pulse process necessary for fish spawning in downstream spawning grounds. Additionally, the patent outlines the selection criteria for the rising flow, average flow increase, and duration of water rising, as well as the calculation of the high-flow surge frequency of spawning ground-controlled sections considering incoming water from interval tributaries. The method provides a comprehensive approach to ecological modulation in main stream reservoirs, considering the complex interplay of various factors to optimize the ecological conditions for fish spawning.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.