| 生物土壤与生态 |
|
|
|
|
| Simulated Experiment of Erosion by Wind and Rainfall on Sandy Loess in Weiliantan Gully |
SONG Yang1,2, YAN Ping1,2, LIU Lian-you1,2, YANG Heng-hua3*, ZHU Meng-jun1,2, DU Jian-hui1,2, MA Yu-feng1,2 |
| 1.College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China; 2.China Center of Desert Research at Beijing Normal University, Beijing 100875, China;3.Sand Control Experimental Station of Qinghai Province, Gonghe 813005, Qinghai, China |
|
|
|
|
Abstract Weiliantan gully is located at Guinan County, Qinghai Province, which is surfured from serious soil erosion by both wind and water. In this study, sandy loess samples of Weiliantan gully are collected, and through wind tunnel and simulated rainfall experiment, the processes of complex erosion by wind and rainfall on sandy loess of Weiliantan gully is studied. The results of these experiments can be summarized as three parts. ① Rainfall after first wind tunnel experiment formed hard soil crust, so the resistance of soil to erosion was strengthened, then the wind erosion rate was decreased in the next wind tunnel experiment. ② Soil moisture and human disturbance are two important influencing factors of wind erosion. These two factors play different roles in wind erosion. When soil moisture is low, human disturbance can have great influence on wind erosion. When soil moisture is high, wind erosion can hardly be affected by human disturbance. ③ In the continuous simulated rainfall experiment, the runoff yield and sand discharge of sand loess changed with the rainfall intensity. This change is associated with the erosion rate of surface soil, the content of erodible particles, soil moisture and infiltration rate, etc.
|
|
Received: 02 November 2006
Published: 20 September 2007
|
|
|
［1］邹亚荣,张增祥,王长有,等.中国风水侵蚀交错区分布特征分析［J］.干旱区研究,2003,20(1):67-70.
［2］Bullard J E,Livingstone I.Interactions between aeolian and fluvial systems in dryland environments［J］.Area,2002,34: 8-16.
［3］董光荣,高尚玉,金炯,等.青海共和盆地土地沙漠化与防治途径［M］.北京：科学出版社,1993:15-24.
［4］董治宝.中国风沙物理研究五十年（Ⅰ）［J］.中国沙漠,2005,25(3): 293-305.
［5］董治宝,郑晓静.中国风沙物理研究五十年（Ⅱ）［J］.中国沙漠,2005,25(6):795-815.
［6］刘小平,董治宝. 空气动力粗糙度的物理与实践意义［J］.中国沙漠,2003,23(4):337-346.
［7］郝青振,邹学勇,董光荣,等. 室内沙风洞空洞条件下流场规律［J］.中国沙漠,1998,18(4):334-339.
［8］张士锋,刘昌明,夏军,等.降雨径流过程驱动因子的室内模拟实验研究［J］.中国科学:D辑,2004,34(3):280-289.
［9］袁建平,蒋定生.甘淑.影响坡地降雨产流历时的因子分析［J］.山地学报,1999,17(3):259-264.
［10］李元寿,王根绪,沈永平,等.长江源区不同植被覆盖下产流产沙效应初步研究［J］.冰川冻土,2005,27(6):869-875.
［11］宋阳,刘连友,严平,等.风水复合侵蚀研究述评［J］.地理学报,2006,61(1):77-88.
［12］周佩华,王占礼.黄土高原土壤侵蚀暴雨的研究［J］.水土保持学报,1992,6(3):1-5.
［13］董治宝,陈渭南,董光荣,等.关于人为地表结构破损与土壤风蚀关系的定量研究［J］.科学通报,1995,40(1):54-57.
［14］董光荣,李长治,金炯,等. 关于土壤风蚀风洞实验的某些结果［J］.科学通报,1987,32(4):297-301.
［15］吴正.风沙地貌与治沙工程学［M］.北京:科学出版社,2003:61-66.
［16］肖文波,胡林,蔡绍洪.颗粒物质中的崩塌现象［J］.中国沙漠,2004,24(6):798-801.
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2007, Vol. 27 
