长江科学院院报 ›› 2024, Vol. 41 ›› Issue (12): 66-72.DOI: 10.11988/ckyyb.20230911

• 水土保持与生态修复 • 上一篇    下一篇

三峡库区河流水体碳变化驱动力分析

程学军1,2(), 付重庆1,2(), 肖潇1,2, 张双印1,2, 徐坚1,2, 郑航3, 廖茂昕1,2   

  1. 1 长江科学院 空间信息技术应用研究所,武汉 430010
    2 长江科学院 武汉市智慧流域工程技术研究中心,武汉 430010
    3 长江勘测规划设计研究有限责任公司,武汉 430010
  • 收稿日期:2023-08-22 修回日期:2023-10-27 出版日期:2024-12-01 发布日期:2024-12-01
  • 通信作者:
    付重庆(1999-),男,河南商丘人,硕士研究生,研究方向为水利信息化与水利遥感。E-mail:
  • 作者简介:

    程学军(1975-),男,湖南宁乡人,正高级工程师,博士,主要从事水利信息化与水利遥感研究。E-mail:

  • 基金资助:
    中央级公益性科研院所基本科研业务费项目(CKSF2023296/KJ); 湖南省重大水利科技项目(XSKJ2022068-12); 2022年度知识创新专项基础研究项目(2022010801010238)

Drivers for Carbon Variation of River in Three Gorges Reservoir Area

CHENG Xue-jun1,2(), FU Chong-qing1,2(), XIAO Xiao1,2, ZHANG Shuang-yin1,2, XU Jian1,2, ZHENG Hang3, LIAO Mao-xin1,2   

  1. 1 Spatial Information Technology Application Department, Changjiang River Scientific Research Institute,Wuhan430010, China
    2 Wuhan Smart Basin Engineering Technology Research Center, Changjiang River ScientificResearch Institute, Wuhan 430010, China
    3 Changjiang Survey, Planning, Design and Research Co., Ltd.,Wuhan 430010, China
  • Received:2023-08-22 Revised:2023-10-27 Published:2024-12-01 Online:2024-12-01

摘要:

为探究流域景观特征对河流碳循环过程的影响,综合运用景观指数法、冗余分析(RDA)法和Pearson相关性分析法,分析长江三峡库区段景观因子对河流碳循环的影响。 结果表明: 长江三峡库区段土地利用和景观格局对水体溶解性碳浓度和水-气界面CO2、CH4通量影响最大的缓冲区尺度为1 500 m;1 500 m缓冲区内影响水体溶解性碳的关键变量有建筑用地和林地,影响水-气界面CO2和CH4通量的关键变量有建筑用地、林地、草地、耕地、裸地、香农多样性指数(SHDI)和斑块丰富度(PRD)。

关键词: 土地利用, 景观指数, 温室气体, 溶解性无机碳, 溶解性有机碳, 缓冲区

Abstract:

Understanding the impact of land use and landscape patterns on river carbon cycling is crucial for improving the watershed environment. This study utilized the landscape index method, redundancy analysis (RDA), and Pearson correlation analysis to analyze the effects of landscape factors on river carbon cycling in the Three Gorges Reservoir area. The findings reveal that: 1) Within a buffer zone scale of 1 500 m, the land use and landscape patterns have a substantial impact on the concentration of dissolved carbon in water and the fluxes of CO2 and CH4 at the water-air interface. 2) The dissolved carbon within the 1 500 m buffer zone is influenced by several key variables, including built-up land, and forest land. For CO2 and CH4 fluxes at the water-air interface, influential variables include built-up land, forest land, grassland, arable land, bare land, Shannon’s diversity index (SHDI), and patch richness density (PRD).

Key words: land use, landscape index, greenhouse gases, dissolved inorganic carbon(DIC), dissolved organic carbon(DOC), buffer zones

中图分类号: