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    近自然水土保持:理念内涵、理论框架与实践路径

    Near-natural soil and water conservation: Conceptual connotation, theoretical framework and practical pathways

    • 摘要: 在水土保持目标由单一控蚀向过程修复、系统治理和多功能协同拓展的背景下,传统水土保持实践中仍存在一定程度的“重工程、轻过程,重指标、轻演替”倾向。为回应新时代水土保持治理转型需求,本文采用理论梳理、框架构建与案例分析相结合的方法,综合近自然林业、基于自然的解决方案、生态系统服务和适应性管理等相关理论,提出近自然水土保持理念,并对其概念内涵、理论框架、实施路径和典型应用进行阐释。研究认为,近自然水土保持并非排斥必要工程措施,而是强调以尊重地形地貌格局和水文—土壤—植被过程为基础,通过工程措施、生物措施与耕作措施的生态化、适地化和协同配置,实现水土流失防治、生态过程修复与生态系统服务提升的统一。本文进一步构建了以再野化、生态留白和生态弹性为支撑的机制框架,提出了场地条件识别与生态基底诊断、生态治理单元体系构建、低扰动措施组合、生态过程连通性构建以及适应性管理与动态维护的五步技术路径,并从生态基底、生态结构、生态过程、干预方式和管理维护5个维度初步构建近自然度评价框架。该理念和路径可为水土保持由工程控制向过程协同转型提供理论参考,也可为不同区域水土保持与生态修复实践提供方法借鉴。

       

      Abstract: As the goals of soil and water conservation shift from single erosion control toward process restoration, systematic governance and multifunctional synergy, conventional practices still show a tendency to emphasize engineering measures and short-term indicators while paying insufficient attention to ecological processes and natural succession. To respond to the transformation needs of soil and water conservation in the new era, this paper adopts an approach combining theoretical review, framework construction and case analysis. By integrating theories and practices related to near-natural forestry, nature-based solutions, ecosystem services and adaptive management, this paper proposes the concept of near-natural soil and water conservation and explains its conceptual connotation, theoretical framework, implementation pathway and typical applications. The study suggests that near-natural soil and water conservation does not exclude necessary engineering measures, but emphasizes respect for landform patterns and hydrological-soil-vegetation processes. Through the ecological, site-specific and coordinated allocation of engineering, biological and tillage measures, it aims to integrate soil erosion control, ecological process restoration and ecosystem service enhancement. This paper further constructs a mechanism framework supported by rewilding, ecological blank space and ecological resilience, proposes a five-step technical pathway consisting of site condition identification and ecological baseline diagnosis, ecological governance unit construction, low-disturbance measure combination, ecological process connectivity construction, and adaptive management and dynamic maintenance, and preliminarily develops a naturalness evaluation framework from five dimensions: ecological baseline, ecological structure, ecological process, intervention mode and management maintenance. The proposed concept and pathway can provide theoretical references for the transformation of soil and water conservation from engineering control to process coordination, and offer methodological support for soil and water conservation and ecological restoration practices in different regions.

       

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