京津风沙源治理工程区生态环境质量及驱动力
王卫国, 谢欢, 冯国庆, 家淑珍

Ecological environment quality and driving forces in the Beijing-Tianjin Sandstorm Source Control Project area
Weiguo Wang, Huan Xie, Guoqing Feng, Shuzhen Jia
表3 京津风沙源二期治理工程区生态环境质量各等级面积和比例
Table 3 Area and ratio on the different classes of ecological quality in the BTSSCPA from 2000 to 2020
年份较差一般

面积

/万km2

比例

/%

面积

/万km2

比例

/%

面积

/万km2

比例/%

面积

/万km2

比例/%

面积

/万km2

比例

/%

200022.931.424.032.914.620.07.19.74.46.0
200521.930.018.825.816.522.68.912.26.99.4
201019.526.725.234.514.119.37.910.86.38.7
201519.626.820.327.816.422.59.312.77.410.2
202015.721.519.526.718.825.811.015.18.010.9