PDF Download

[1]WU Xiao-xia,GU Zhu-jun.Influence of Time Scale on the Quantitative Study of Soil and Water Conservation in Grassland[J].Research of Soil and Water Conservation,2014,21(05):59-65.

Copy

Influence of Time Scale on the Quantitative Study of Soil and Water Conservation in Grassland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 05 Page number: 59-65 Column: Public date: 2014-10-28

Title:: Influence of Time Scale on the Quantitative Study of Soil and Water Conservation in Grassland

Author(s):: WU Xiao-xia, GU Zhu-jun; School of Bio-chemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China

Keywords:: time scale; leaf area index; water conservation effect; soil conservation effect

CLC:: S157.1

DOI:: -

Abstract:: Quantitative analysis of time scale effects on vegetation soil and water conservation favors further understanding the conservation mechanism. Based on the observation data of the grass covered soil and bare soil (control) experimental plots located in Hetian Town, Changting County of Fujian Province from 2007 to 2010, characteristics of 4 parameters(rainfall, vegetation, RE and SE) were analyzed at rainfall event, month, season, and annual scale, respectively, and then the linear regression models were established to describe the relationships between RE(SE) and its influencing factors of rainfall and vegetation. RE(SE) means the ratio of runoff depth (soil loss) of grass covered plot to that of the control plot. Results show that these 4 parameters presented different magnitude and variation at different time scales. RE and SE were relatively stable either within or among different time scales due to their ratios reducing the influence of other factors. The coupling of rainfall and vegetation led to better water conservation effect at lower REs (< 0.3) at rainfall event scale as well as at season scale, while the water conservation effect was dominated by rainfall at slightly higher(0.3~0.4)and higher(> 0.7)REs at rainfall event scale as well as at annual scale (R² > 0.78). For the soil conservation effect, rainfall or/and vegetation were the dominated influence factors at rainfall event and annual scales, and the grass LAI could basically present the positive conservation effect(SE < 1, R² > 0.55), while the maximum 30 min intensity (I₃₀) could describe the negative conservation effect more accurately(SE > 1, R² > 0.79). More uncertainties(R² ≈0.4) exist in the models of both RE and SE at two moderate time scales (month and season). Consequently, factors influencing soil and water conservation effect of grass present different variation and coupling characteristics at different time scales, indicating the importance of time scale in terms of the study on soil and water conservation.

References:: [1] 郑粉莉,王占礼,杨勤科.我国土壤侵蚀科学研究回顾和展望[J].自然杂志,2008,30(1):12-16.
[2] Fekete B M, V?r?smarty C J, Lammers R B. Scaling gridded river networks for macroscale hydrology:Development, analysis, and control of error[J]. Water Resources Research,2001,37(7):1955-1967.
[3] 邱扬,傅伯杰.异质景观中水土流失的空间变异与尺度变异[J].生态学报,2004,24(2):330-337.
[4] 李鹏,李占斌,郑良勇.植被保持水土有效性研究进展[J].水土保持研究,2002,9(2):76-80.
[5] 余新晓,张晓明,武思宏,等.黄土区林草植被与降水对坡面径流和侵蚀产沙的影响[J].山地学报,2006,24(1):19-26.
[6] 彭绍云,顾祝军,修平.南方红壤试验小区乔灌草多年水土保持效应比较[J].水土保持研究,2013,20(1):25-29.
[7] Chirino E, Bonet A, Bellot J, et al. Effects of 30-year-old Aleppo pine plantations on runoff, soil erosion, and plant diversity in a semi-arid landscape in south eastern Spain[J]. Catena,2006,65(1):19-29.
[8] 张清春,刘宝元,翟刚.植被与水土流失研究综述[J].水土保持研究,2002,9(4):96-101.
[9] Zhang B, Yang Y, Zepp H. Effect of vegetation restoration on soil and water erosion and nutrient losses of a severely eroded clayey Plinthudult in southeastern China[J]. Catena,2004,57(1):77-90.
[10] Zhou Z C, Shangguan Z P, Zhao D. Modeling vegetation coverage and soil erosion in the Loess Plateau Area of China[J]. Ecological Modelling,2006,198(1/2):263-268.
[11] 王升,王全九,董文财,等.黄土坡面不同植被覆盖度下产流产沙与养分流失规律[J].水土保持学报,2012,26(4):23-27.
[12] Zhang X, Yu X, Wu S, et al. Effects of forest vegetation on runoff and sediment production on sloping lands of Loess area[J]. Chinese Journal of Applied Ecology,2005,16(9):1613-1617.
[13] Zheng H, Chen F, Ouyang Z, et al. Impacts of reforestation approaches on runoff control in the hilly red soil region of Southern China[J]. Journal of Hydrology,2008,356(1/2):174-184.
[14] 孙佳佳,于东升,史学正,等.植被叶面积指数与覆盖度定量表征红壤区土壤侵蚀关系的对比研究[J].土壤学报,2010,47(6):1060-1066.
[15] Panicker G K, Tiwari S C, Bunch J, et al. Research on biomass development and residue decomposition of horticultural crops for erosion prediction models:Philosophy and methodology of data collection[J]. Acta Horticulturae,2004,638:53-58.
[16] 王希群,马履一,贾忠奎,等.叶面积指数的研究和应用进展[J].生态学杂志,2005,24(5):537-541.
[17] 顾祝军,刘咏梅,陆俊英.用多辐射校正水平遥感数据提取植被叶面积指数的精度分析[J].土壤学报,2010,47(6):39-46.
[18] Wang J Q, Lu Z H. Study on impact of land use changes on the hydrological system[J]. Advance in Earth Sciences,2003,18(2):292-298.
[19] 李瑞,李勇,刘云芳.贵州喀斯特地区降雨与坡面土壤侵蚀关系研究[J].水土保持研究,2012,19(3):7-11.
[20] 聂小军,苏艳艳.川中丘陵区紫色土坡耕地土壤侵蚀特征[J].生态环境学报,2012,21(4):682-686.
[21] 鲁克新,李占斌,鞠花,等.不同空间尺度次降雨径流侵蚀功率与降雨侵蚀力的对比研究[J].西北农林科技大学学报:自然科学版,2009,37(10):204-209.
[22] de Vente J, Poesen J, Verstraeten G, et al. Spatially distributed modelling of soil erosion and sediment yield at regional scales in Spain[J]. Global and Planetary Change,2008,60(3/4):393-415.
[23] 冯永丽,李阳兵,程晓丽,等.重庆市主城区不同地质条件下土壤侵蚀时空分异特征[J].水土保持学报,2011,25(5):30-34.
[24] 焦菊英,王万中,郝小品.黄土高原不同类型暴雨的降水侵蚀特征[J].干旱区资源与环境,1999,13(1):34-42.
[25] 刘正佳,刘占仁,王丝丝,等.基于日降雨的启蒙山区降雨侵蚀力时空变化研究[J].水土保持研究,2012,19(2):34-38.
[26] Andreu V, Imeson A C, Rubio J L. Temporal changes in soil aggregates and water erosion after a wildfire in a Mediterranean pine forest[J]. Catena,2001,44(1):69-84.
[27] 吴玫,何丙辉,王锐亮.川北紫色土深丘区径流及土壤侵蚀研究[J].水土保持研究,2013,20(1):9-13.
[28] Wischmeier W H, Smith D D. Rainfall energy and its relationship to soil loss[J]. Transactions, American Geophysical Union,1958,39:285-291.

Similar References:

Memo

Last Update: 1900-01-01