河流系统是自然界最重要的生态系统之一,自人类诞生以来,其生存和发展依赖于水环境。维护河流生态系统的健康,实现人与河流持久的和谐共存,是河流生态保护的根本目标。摄影/黄正平 The river system is one of the most important ecosystems in nature. Since its birth, its existence and development have relied on the water environment. Maintaining the health of the river ecosystem and achieving long-term harmonious co-existence between man and the river are the fundamental goals of river ecological protection. Photography / Huang Zhengping