Research on River Ecosystem Restoration and Sustainable Governance Strategies Based on Ecological Isotope Technology

Abstract

Degradation of river ecosystems is a global water environment problem. Traditional engineering governance models focus on flood control and river channel regulation, while ignoring the systematic restoration of ecological functions. Based on ecological isotope tracing technology, this article systematically studies the impact mechanism of river morphological changes, water flow velocity distribution and river bed stability on the ecosystem, and builds a three-in-one governance framework of "hydrodynamic simulation-isotope tracing-ecological restoration strategy". Research shows that stable isotopes of carbon and nitrogen (δ¹³C, δ¹⁵N) can effectively trace material circulation and energy flow paths in river ecosystems, quantify the impact of hydrological connectivity on food web structure, and provide precise targeting for active ecological restoration. This article proposes to improve the hydraulic model to enhance the unsteady and nonlinear prediction capabilities, and combine isotope monitoring data to optimize restoration timing and program selection, providing theoretical support and practical paths for the transformation of river engineering management from "single engineering orientation" to "ecological collaborative management".