中国地理科学 ›› 2017, Vol. 27 ›› Issue (1): 13-24.doi: 10.1007/s11769-017-0843-3

• 论文 • 上一篇    下一篇

Impacts of Land-use and Land-cover Changes on River Runoff in Yellow River Basin for Period of 1956-2012

WANG Fang, GE Quansheng, YU Qibiao, WANG Huaxin, XU Xinliang   

  1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • 收稿日期:2016-05-15 修回日期:2016-09-06 出版日期:2017-02-27 发布日期:2017-01-06
  • 通讯作者: WANG Fang.E-mail:wangf@igsnrr.ac.cn E-mail:wangf@igsnrr.ac.cn
  • 基金资助:

    Under the auspices of Key Program of Chinese Academy of Sciences (No. KJZD-EW-TZ-G10), National Key Research and Development Program of China (No. 2016YFA0602704), Breeding Project of Institute of Geographic Sciences and Natural Resources Research, CAS (No. TSYJS04)

Impacts of Land-use and Land-cover Changes on River Runoff in Yellow River Basin for Period of 1956-2012

WANG Fang, GE Quansheng, YU Qibiao, WANG Huaxin, XU Xinliang   

  1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2016-05-15 Revised:2016-09-06 Online:2017-02-27 Published:2017-01-06
  • Contact: WANG Fang.E-mail:wangf@igsnrr.ac.cn E-mail:wangf@igsnrr.ac.cn
  • Supported by:

    Under the auspices of Key Program of Chinese Academy of Sciences (No. KJZD-EW-TZ-G10), National Key Research and Development Program of China (No. 2016YFA0602704), Breeding Project of Institute of Geographic Sciences and Natural Resources Research, CAS (No. TSYJS04)

摘要:

River runoff is affected by many factors, including long-term effects such as climate change that alter rainfall-runoff relationships, and short-term effects related to human intervention (e.g., dam construction, land-use and land-cover change (LUCC)). Discharge from the Yellow River system has been modified in numerous ways over the past century, not only as a result of increased demands for water from agriculture and industry, but also due to hydrological disturbance from LUCC, climate change and the construction of dams. The combined effect of these disturbances may have led to water shortages. Considering that there has been little change in long-term precipitation, dramatic decreases in water discharge may be attributed mainly to human activities, such as water usage, water transportation and dam construction. LUCC may also affect water availability, but the relative contribution of LUCC to changing discharge is unclear. In this study, the impact of LUCC on natural discharge (not including anthropogenic usage) is quantified using an attribution approach based on satellite land cover and discharge data. A retention parameter is used to relate LUCC to changes in discharge. We find that LUCC is the primary factor, and more dominant than climate change, in driving the reduction in discharge during 1956-2012, especially from the mid-1980s to the end-1990s. The ratio of each land class to total basin area changed significantly over the study period. Forestland and cropland increased by about 0.58% and 1.41%, respectively, and unused land decreased by 1.16%. Together, these variations resulted in changes in the retention parameter, and runoff generation showed a significant decrease after the mid-1980s. Our findings highlight the importance of LUCC to runoff generation at the basin scale, and improve our understanding of the influence of LUCC on basin-scale hydrology.

关键词: land-use and land-cover change, natural discharge, retention parameter, runoff generation, Yellow River Basin

Abstract:

River runoff is affected by many factors, including long-term effects such as climate change that alter rainfall-runoff relationships, and short-term effects related to human intervention (e.g., dam construction, land-use and land-cover change (LUCC)). Discharge from the Yellow River system has been modified in numerous ways over the past century, not only as a result of increased demands for water from agriculture and industry, but also due to hydrological disturbance from LUCC, climate change and the construction of dams. The combined effect of these disturbances may have led to water shortages. Considering that there has been little change in long-term precipitation, dramatic decreases in water discharge may be attributed mainly to human activities, such as water usage, water transportation and dam construction. LUCC may also affect water availability, but the relative contribution of LUCC to changing discharge is unclear. In this study, the impact of LUCC on natural discharge (not including anthropogenic usage) is quantified using an attribution approach based on satellite land cover and discharge data. A retention parameter is used to relate LUCC to changes in discharge. We find that LUCC is the primary factor, and more dominant than climate change, in driving the reduction in discharge during 1956-2012, especially from the mid-1980s to the end-1990s. The ratio of each land class to total basin area changed significantly over the study period. Forestland and cropland increased by about 0.58% and 1.41%, respectively, and unused land decreased by 1.16%. Together, these variations resulted in changes in the retention parameter, and runoff generation showed a significant decrease after the mid-1980s. Our findings highlight the importance of LUCC to runoff generation at the basin scale, and improve our understanding of the influence of LUCC on basin-scale hydrology.

Key words: land-use and land-cover change, natural discharge, retention parameter, runoff generation, Yellow River Basin