Project Overview

案例概述

1.Implementation Period: 2023 – March 2025

2.Location and Scale: Along the coast of Rudong County, Nantong City, Jiangsu Province, the total installed capacity of the photovoltaic (PV) project reaches 400,000 kilowatts, covering an area of 290 hectares, and nearly 1,000 hectares of Spartina alterniflora have been controlled.

3. Main Content of the Project: It adopts the model of "photovoltaic (PV) + hydrogen energy + energy storage + ecological restoration" to contribute to the achievement of the "dual carbon" goals (carbon peaking and carbon neutrality) and the goal of invasive species control.

①Survey and Site Selection: Conduct ecological surveys and select sites in Spartina alterniflora tidal flats with low ecological benefits.

②R&D and Practice of PV-Aided Spartina alterniflora Control Technology: Develop PV-aided Spartina alterniflora control technology, and take advantage of the characteristics of PV construction to simultaneously control Spartina alterniflora.

③Ecological Construction for PV Project: Establish a three-dimensional transportation network to pass through the clam breeding area without damage; adopt the technology of "trenchless directional drilling + temporary cofferdam" to reduce disturbances to the seawall; give priority to construction during neap tides to ensure the protection of benthic organisms and fish.

④Restoration of Benthic Organisms: Release benthic organisms, backfill the embankment, and restore the original habitat.

⑤Intelligent Management and Protection: Realize "unmanned on-duty" operation and maintenance as well as biodiversity monitoring through the intelligent construction site system, and strictly prevent the secondary invasion of Spartina alterniflora.

4. Brief Description of Project Achievements: With a total installed capacity of 400,000 kilowatts, this photovoltaic project can reduce carbon dioxide emissions by 309,400 tons annually, providing green electricity for 700,000 households. It has also coordinated the control of Spartina alterniflora covering an area of more than 1,000 hectares. By virtue of the innovative model of "photovoltaic + hydrogen energy + energy storage + ecological restoration", the project has achieved a win - win situation in both energy development and ecological protection.

1. 实施时间：2023年-2025年3月

2. 地点与规模：江苏省南通市如东县沿海，光伏总装机40万千瓦，场区290公顷，治理互花米草近1000公顷。

3. 项目主要内容：以“光伏+氢能+储能+生态修复”的模式助力“双碳”和入侵物种治理目标实现。

①调查与选址。进行生态调查，选址于生态效益低的互花米草滩。

②光伏治草技术研发与实践。研发光伏治草技术，利用光伏建设特点同步治理互花米草，；

③光伏建设生态施工。构建立体运输网络，零损伤穿越文蛤养殖区；采用“非开挖定向钻+临时围堰”技术，降低对海堤扰动；优先在平潮期施工，兼顾底栖生物与鱼类保护。

④底栖生物恢复。投放底栖生物，回填堤岸，恢复原生生境。

⑤智慧管护。借智慧工地系统实现“无人值守”运维和生物多样性监测，严防互花米草二次入侵。

4. 项目成果简述：本光伏项目总装机40万千瓦，年减排二氧化碳30.94万吨，惠及70万家庭绿电，协同治理占地大于1000公顷的互花米草，凭“光伏+氢能+储能+生态修复”的创新模式，达成能源与生态双赢。

Company/Organization Profile

机构简介

Guohua (Rudong) New Energy Co., Ltd. is an enterprise under the National Energy Group. The company closely follows the main line of high-quality development, adheres to the leadership of the Party, value creation, innovation-driven, and integration of industry and finance, and strives to build a characteristic development model of "integrated wind, solar, hydrogen, storage and finance", contributing green power to the construction of a world-class clean and low-carbon energy technology leading enterprise.

国华（如东）新能源有限公司是国家能源集团旗下的企业。公司紧贴高质量发展主线，坚持党的领导、价值创造、创新驱动、产融结合，全力打造“风光氢储一体化”特色发展模式，为建设世界一流清洁低碳能源科技领军企业贡献绿色力量。

Project Outcome

项目成果

1. Dual Benefits of Green Power Supply and Carbon Emission Reduction: With a total installed capacity of 400,000 kilowatts, the project reduces carbon dioxide emissions by 309,400 tons annually, equivalent to the annual carbon sequestration capacity of forests in 1.5 West Lake scenic areas. It can provide green electricity for 700,000 households every year, strongly advancing the achievement of the “dual carbon” goals (carbon peaking and carbon neutrality).

2. Efficient Control of Spartina alterniflora: Innovating the "photovoltaic + weed control" collaborative model, the project has controlled over 1,000 hectares of coastal areas invaded by Spartina alterniflora. Through the technology of "mowing + plowing + rolling + native vegetation restoration", the weed removal rate exceeds 99%, with no regrowth of Spartina alterniflora under the photovoltaic panels.

3. Increase in Benthic Organism Biomass: After the project completion, benthic organisms are released and the original habitat is restored, aiming to increase the benthic organism biomass to 1.5 times the original level, laying a foundation for the construction of the coastal ecosystem.

4. Improvement of Intertidal Biodiversity: The increase in the types and quantities of intertidal organisms provides sufficient food sources for birds, resulting in the bird community size being several times that of the original Spartina alterniflora-invaded tidal flats and achieving a comprehensive improvement in biodiversity.

5. It provides important reference for the management of Spartina alterniflora—a global coastal invasive species, setting a paradigm for addressing such ecological challenges.

1. 绿电供应与碳减排双效：项目总装机40万千瓦，年减排二氧化碳30.94万吨，等效于1.5个西湖景区的森林碳汇能力，每年可为70万家庭提供绿色电力，强力助推“双碳”目标实现。

2. 互花米草高效治理：创新“光伏+治草” 协同模式，治理沿海互花米草入侵区域超1000公顷，通过“刈割+翻耕+碾压+本土植被恢复”技术实现除治成效超过99%，光伏板下无米草复发。

3. 底栖生物量增加：项目建成后投放底栖生物并恢复原生生境，力争将底栖生物量提升到原来的1.5倍，为滨海生态系统构建奠定基础。

4. 潮间带生物多样性提升：潮间带生物种类和数量的增加，为鸟类提供充足食物来源，鸟类群落数量是原互花米草滩的数倍，实现生物多样性水平全面提升。

5. 入侵物种治理中国模板：为互花米草治理这一世界性滨海入侵物种治理提供了重要借鉴。

Project Highlights

项目亮点

Photovoltaic (PV) facilities are built on Spartina alterniflora-invaded tidal flats that are barely usable by wetland waterbirds, activating land with low ecological efficiency. The innovative "PV + Spartina alterniflora control" collaborative model promotes PV construction and Spartina alterniflora management simultaneously. During the 20-year operation period, the weed control effect can be guaranteed by the enterprise's human and financial resources, ensuring the ecological effectiveness of weed management. In line with the "dual carbon" strategy (carbon peaking and carbon neutrality), this model provides a new paradigm for the coordination of energy development and biodiversity protection.

利用湿地水鸟难以利用的互花米草入侵滩涂建设光伏，激活生态低效用地。创新“光伏治草”协同模式，同步推进光伏建设与互花米草治理，20年运营期可依托企业人力财力保障除治效果，确保治草生态成效。契合“双碳”战略，为能源开发与生物多样性保护协同提供新范式。

Project Implementation

项目实施

1. Overview of the Implementation Plan

The project is located in the Spartina alterniflora - invaded area along the coast of Rudong County, Nantong City, where tidal flats are barely usable by wetland waterbirds. It has established an integrated plan of "photovoltaic (PV) + hydrogen energy + energy storage + ecological restoration". On one hand, the construction of a PV power station with an installed capacity of 400,000 kilowatts is promoted; on the other hand, Spartina alterniflora control and ecological protection are carried out simultaneously. While building the PV power station, the project has pioneered the exploration of a coordinated mechanism for PV - aided Spartina alterniflora control in China's coastal wetlands. By comparing and studying the application scope, disposal efficiency, advantages and disadvantages of different Spartina alterniflora control measures, and combining with the distribution characteristics of Spartina alterniflora in the project implementation area as well as relevant policies on biodiversity protection and reclamation, a comprehensive Spartina alterniflora control method has been formed. The project also studies and analyzes the synergistic and efficiency - enhancing effect of "PV - aided Spartina alterniflora control", expanding new ideas for the "PV + ecological governance" model.

1. 实施方案概况

本项目选址于南通市如东县沿海湿地水鸟基本无法利用的互花米草入侵区域，构建“光伏+氢能+储能+生态修复”一体化方案。一方面，按40万千瓦装机规模推进光伏电站建设；另一方面，同步开展互花米草治理与生态保护。在建设光伏电场的同时，首次在我国滨海湿地探索了光伏治草协同机制。通过对比研究不同互花米草治理措施的适用范围、处置效率及优缺点，结合项目实施区域互花米草分布特征及生物多样性保护、围填海等相关政策，形成花米草综合治理方式，研究分析“光伏治草”协同增效作用，拓宽“光伏+生态治理”模式新思路。

2. Implementation Process

2023: Preliminary Preparation. During the site selection, on-site investigation of the photovoltaic (PV) project and visits to local government departments, it was found that the project area is highly suitable in terms of terrain, geology, sunlight and other conditions. However, Spartina alterniflora is densely distributed here, which has seriously damaged the balance of the ecological system and biodiversity.

2024: Project Construction. In line with the local Spartina alterniflora prevention and control requirements, after discussions among experts in ecology, energy and environment, it was finally decided to implement Spartina alterniflora control and PV construction in this area with intensive Spartina alterniflora distribution. At the same time, the "PV - aided Spartina alterniflora control" implementation plan and the research project plan were formulated.

2025: Research Project Implementation. After the project construction was completed in March 2025, an objective assessment was conducted on indicators including the effectiveness of Spartina alterniflora removal, environmental impacts, and biodiversity impacts. This assessment has facilitated the formation of a synergistic and efficiency-enhancing mechanism for "photovoltaic-aided Spartina alterniflora control".

2. 实施过程

2023年：前期准备。在光伏项目选址、现场调查以及地方政府部门走访调研时发现，该项目区地形、地质、光照等条件的高度适配性，但互花米草密集分布，严重破坏生态系统平衡和生物多样性。

2024年：项目施工。结合当地互花米草防治要求，经过生态、能源、环境各方专家讨论，最终确定在该互花米草集中分布区实施米草治理与光伏建设。同时，制定了“光伏治草”实施方案和课题研究方案。

2025年：经验总结。2025年3月项目施工完成后，客观评估了互花米草除治成效、环境影响、生物多样性影响等指标评估分析，推动“光伏治草”协同增效机制形成。

3. Comparison Before and After Implementation

After the implementation of the project, the overall ecological restoration effect in the PV governance area is remarkable.The specific impacts are as follows:

(1) Spartina alterniflora Control

After the project implementation, there is no regrowth of Spartina alterniflora under the PV panels, and only sporadic regrowth occurs around the PV plant area and in the bare tidal flat area. From the perspectives of removal completion rate, regrowth rate and plant density in the regrowth area, the removal effect of the Spartina alterniflora control plan of this project reaches 99.8%.

(2) Ecological Environment Improvement

Based on the analysis of environmental indicators such as soil/sediment and water environment, the evaluation values of environmental impact factors monitored in the "PV - aided weed control area" and the "comprehensive weed control area" are similar and slightly higher than those before the project implementation.

(3) Biodiversity Restoration

After the project implementation, the types and quantities of native plants, intertidal organisms and birds in the Spartina alterniflora control area have increased significantly. The abundant intertidal organisms provide sufficient food for birds, so the restoration effect of the bird community is also very significant.

3. 实施前后对比

项目实施后，光伏治理区域整体生态恢复成效显著，具体如下：

(1) 互花米草治理：项目实施后，光伏板下无互花米草复发，仅光伏场区周边及光滩区域零星复发，从除治完成率、复发率、复发区植株密度等角度分析，本项目互花米草治理实施方案的除治成效达到99.8%。

(2) 生态环境提升：从土壤/沉积物、水体环境等环境指标分析，“光伏治草区”与“综合治草区”监测的环境影响因子评估值相近且较项目实施前略有提升。

(3) 生物多样性恢复：项目实施后，互花米草治理区本土植物、潮间带生物及鸟类的种类和数量均显著提升，丰富的潮间带生物为鸟类提供了充足的食物，因此鸟类群落的恢复效果也十分显著。

Project Impact & Sustainability

项目影响力、可推广性与可持续性

This project is an important part of the third batch of national "Sagebrush Desert Large-scale Wind and Photovoltaic Base Projects" and also China's first demonstration project integrating "photovoltaic-hydrogen-energy storage comprehensive energy utilization" and "coastal ecological management", with the dual value of implementing the national energy strategy and protecting regional ecology. China's coastal areas are abundant in solar energy resources, boasting great potential for photovoltaic development. Meanwhile, they are also high-incidence areas of Spartina alterniflora invasion, leading to prominent conflicts between energy development and ecological protection. To promote coastal photovoltaic construction and unleash the potential of clean energy while effectively protecting the coastal wetland ecological environment, the project innovatively proposes a long-term mechanism for photovoltaic-aided Spartina alterniflora control, and the relevant management plan is under application for a group standard. The implementation of this project provides a replicable model for the exploration and practice of "photovoltaic construction + ecological management" in existing and to-be-built coastal photovoltaic power plants, and is of great significance for realizing the sustainable development of the photovoltaic industry.

本项目是国家第三批“沙戈荒大风电光伏大基地项目”的重要组成部分，也是国内首个光氢储综合能源利用+滨海生态治理示范项目，兼具国家能源战略落地与区域生态保护的双重价值。我国沿海地区光照资源充沛，具备极大光伏建设潜力，同时也是互花米草入侵高发区域，能源开发与生态保护的矛盾突出。为在推进沿海光伏建设、释放清洁能源潜力的同时，切实保护滨海湿地生态环境，项目创新提出光伏治草长效机制，并且治理方案正在申请团体标准。项目的实施，为滨海已建及待建设光伏电场开展光伏建设+生态治理探索实践提供了可复制的范本，对实现光伏可持续发展具有重要意义。

(Using AI translation)

（使用AI翻译）