中国地理科学(英文版) ›› 2008, Vol. 18 ›› Issue (2): 155-161.doi: 10.1007/s11769-008-0155-9

• 论文 • 上一篇    下一篇

Comparative Study on Rain Splash Erosion of Representative Soils in China

CHENG Qinjuan1,2, CAI Qiangguo1, MA Wenjun3   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
    3. College of Resources and Environment, China Agricultural University, Beijing 100094, China
  • 收稿日期:2007-10-18 修回日期:2008-02-05 出版日期:2008-06-20 发布日期:2011-12-14
  • 通讯作者: CAI Qiangguo. E-mail: caiqg@igsnrr.ac.cn E-mail:caiqg@igsnrr.ac.cn
  • 基金资助:

    Under the auspices of National Natural Science Foundation of China ( No. 40471084);Innovation Program of Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (No. 066U0104SZ);State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau (No. 10501-173)

Comparative Study on Rain Splash Erosion of Representative Soils in China

CHENG Qinjuan1,2, CAI Qiangguo1, MA Wenjun3   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
    3. College of Resources and Environment, China Agricultural University, Beijing 100094, China
  • Received:2007-10-18 Revised:2008-02-05 Online:2008-06-20 Published:2011-12-14

摘要:

As the first event of soil erosion, rain splash erosion supplies materials for subsequent transportation and entrainment. The Loess Plateau, the southern hilly region and the Northeast China are subject to serious soil and water loss; however, the characteristics of rain splash erosion in those regions are still unclear. The objectives of the study are to analyze the characteristics of splash erosion on loess soil, red soil, purple soil and black soil, and to discuss the relationship between splash erosion and soil properties. Soil samples spatially distributed in the abovementioned regions were collected and underwent simulated rainfalls at a high intensity of 1.2mm/min, lasting for 5, 10, 15, and 20min, respectively. Rain splash and soil crust development were analyzed. It shows that black soil sample from Heilongjiang Province corresponds to the minimum splash erosion amount because it has high aggregate content, aggregate stability and organic matter content. Loess soil sample from Inner Mongolia corresponds to the maximum splash erosion amount because it has high content of sand particles. Loess soil sample from Shanxi Province has relatively lower splash erosion amount because it has high silt particle content and low aggregate stability easily to be disrupted under rainfalls with high intensity. Although aggregate contents of red soil and purple soil samples from Hubei and Guangdong provinces are high, the stability is weak and prone to be disrupted, so the splash erosion amount is medium. Splash rate which fluctuates over time is observed because soil crust development follows a cycling processes of formation and disruption. In addition, there are two locations of soil crust development, one appears at the surface, and the other occurs at the subsurface.

关键词: rain splash erosion, black soil, loess soil, red soil, purple soil, soil crust

Abstract:

As the first event of soil erosion, rain splash erosion supplies materials for subsequent transportation and entrainment. The Loess Plateau, the southern hilly region and the Northeast China are subject to serious soil and water loss; however, the characteristics of rain splash erosion in those regions are still unclear. The objectives of the study are to analyze the characteristics of splash erosion on loess soil, red soil, purple soil and black soil, and to discuss the relationship between splash erosion and soil properties. Soil samples spatially distributed in the abovementioned regions were collected and underwent simulated rainfalls at a high intensity of 1.2mm/min, lasting for 5, 10, 15, and 20min, respectively. Rain splash and soil crust development were analyzed. It shows that black soil sample from Heilongjiang Province corresponds to the minimum splash erosion amount because it has high aggregate content, aggregate stability and organic matter content. Loess soil sample from Inner Mongolia corresponds to the maximum splash erosion amount because it has high content of sand particles. Loess soil sample from Shanxi Province has relatively lower splash erosion amount because it has high silt particle content and low aggregate stability easily to be disrupted under rainfalls with high intensity. Although aggregate contents of red soil and purple soil samples from Hubei and Guangdong provinces are high, the stability is weak and prone to be disrupted, so the splash erosion amount is medium. Splash rate which fluctuates over time is observed because soil crust development follows a cycling processes of formation and disruption. In addition, there are two locations of soil crust development, one appears at the surface, and the other occurs at the subsurface.

Key words: rain splash erosion, black soil, loess soil, red soil, purple soil, soil crust