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Hydraulic engineering projects provide essential functions and services, including flood regulation, hydroelectric power generation, and agricultural irrigation. Additionally, they offer benefits such as navigation, water purification, recreational opportunities, and biodiversity maintenance for upstream and downstream regions. To comprehensively describe the overall functioning of hydraulic engineering as an ecosystem, evaluate its contributions to human well-being, assess its support for economic and social development, and understand its ecological linkages across regions, it is essential to scientifically account for the comprehensive benefits of these projects. This study uses the Lianhu Reservoir in Lishui, Zhejiang Province, as a case study to assess the Gross Ecosystem Product (GEP) before and after the construction of the hydraulic engineering project. The results show that before the construction of the Lianhu Reservoir (in 2021), the total GEP within the construction area was 206 million yuan. The value of regulating services was 197 million yuan, accounting for 95.6% of the total GEP, with climate regulation and flood control contributing 175 million yuan and 21 million yuan, respectively. The value of provisioning services was 9.06 million yuan, accounting for 4.4% of the total GEP. After the construction of the Lianhu Reservoir, the total GEP within the construction area increased to 1.42 billion yuan. The value of regulating services was 781 million yuan, accounting for 55.0% of the total GEP, with flood control and climate regulation contributing 480 million yuan and 297 million yuan, respectively. The value of cultural services was 498 million yuan, accounting for 35.1% of the total GEP, while the value of provisioning services was 141 million yuan, accounting for 9.9% of the total GEP. The results indicate that compared to the pre-construction period, the GEP after the construction of the Lianhu Reservoir increased by 1.21 billion yuan, representing a 588% increase. Except for the services of agricultural product supply, carbon sequestration and oxygen release, and air purification, all other service items were enhanced.

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Comparison of Ecological Value Before and After the Construction of Hydraulic Engineering Projects: A Case Study of Lianhu Reservoir

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年

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  • Zelong Qu,
  • Jianfeng Li,
  • Guofu Yang

摘要

Hydraulic engineering projects provide essential functions and services, including flood regulation, hydroelectric power generation, and agricultural irrigation. Additionally, they offer benefits such as navigation, water purification, recreational opportunities, and biodiversity maintenance for upstream and downstream regions. To comprehensively describe the overall functioning of hydraulic engineering as an ecosystem, evaluate its contributions to human well-being, assess its support for economic and social development, and understand its ecological linkages across regions, it is essential to scientifically account for the comprehensive benefits of these projects. This study uses the Lianhu Reservoir in Lishui, Zhejiang Province, as a case study to assess the Gross Ecosystem Product (GEP) before and after the construction of the hydraulic engineering project. The results show that before the construction of the Lianhu Reservoir (in 2021), the total GEP within the construction area was 206 million yuan. The value of regulating services was 197 million yuan, accounting for 95.6% of the total GEP, with climate regulation and flood control contributing 175 million yuan and 21 million yuan, respectively. The value of provisioning services was 9.06 million yuan, accounting for 4.4% of the total GEP. After the construction of the Lianhu Reservoir, the total GEP within the construction area increased to 1.42 billion yuan. The value of regulating services was 781 million yuan, accounting for 55.0% of the total GEP, with flood control and climate regulation contributing 480 million yuan and 297 million yuan, respectively. The value of cultural services was 498 million yuan, accounting for 35.1% of the total GEP, while the value of provisioning services was 141 million yuan, accounting for 9.9% of the total GEP. The results indicate that compared to the pre-construction period, the GEP after the construction of the Lianhu Reservoir increased by 1.21 billion yuan, representing a 588% increase. Except for the services of agricultural product supply, carbon sequestration and oxygen release, and air purification, all other service items were enhanced.