Effects of biological soil crusts on the initial abstraction ratio of SCS-CN model in the Loess Plateau

doi:10.13287/j.1001-9332.202112.005

Abstract

Abstract: Hydrological model is an effective tool for hydrological research. The initial abstraction ratio (λ) is a key parameter of SCS-CN model, a commonly used runoff model of great significance to simulate the hydrological process at the watershed scale. In order to examine the effects of biological soil crusts (biocrusts) on λ and improve the accuracy of the model used in the restored grasslands where biocrusts widely presented in the Loess Plateau region, we firstly determined the relationship between the amount of the potential maximum infiltration (S) and the amount of the actual infiltration (F), and then investigated the effects of biocrust coverage on λ by using the simulated rainfall experiment in the Yingwoshanjian watershed in Dingbian County, Shaanxi Province. The revised model was verified by the runoff results of the simulated rainfall experiments in the Zhifanggou watershed in Ansai County, Shaanxi Province. The results showed that the relationship between S and F on biocrust slope was described as S/F=2.5×60/T (where T was the rainfall duration). There was a negative correlation between λ and biocrust coverage (C_BSC) described as λ=0.0791×e^{(-0.015×C_BSC}), R²=0.60. Compared with that using the standard value of λ, the efficiency coefficient of the model was increased by 338.7% and the qualified rate was increased by 16.1% after revising λ according to the biocrust coverage. The results provided a scientific basis for the calibration of λ on biocrust slopes in the Loess Plateau region, and were of great significance to accurately assess the hydrological effects of the implementation of the “Grain for Green” Program on the Loess Plateau.

Key words: biological soil crust, coverage, SCS-CN model, initial abstraction ratio, runoff model

GU Kang-min, ZHAO Yun-ge, GAO Li-qian, YANG Kai, SUN Hui, GUO Ya-li. Effects of biological soil crusts on the initial abstraction ratio of SCS-CN model in the Loess Plateau[J]. Chinese Journal of Applied Ecology, 2021, 32(12): 4186-4194.

References

[1] 刘国彬, 上官周平, 姚文艺, 等. 黄土高原生态工程的生态成效. 中国科学院院刊, 2017, 32(1): 11-19 [Liu G-B, Shangguan Z-P, Yao W-Y, et al. Ecological effects of soil conservation in Loess Plateau. Bulletin of Chinese Academy of Sciences, 2017, 32(1): 11-19]
[2] 王占礼, 邵明安, 常庆瑞. 黄土高原降雨因素对土壤侵蚀的影响. 西北农业大学学报, 1998, 26(4): 101-105 [Wang Z-L, Shao M-A, Chang Q-R. Effects of rainfall factors on soil erosion in Loess Plateau. Acta Universitatis Agriculturalis Boreali-Occidentalis, 1998, 26(4): 101-105]
[3] 陈仁升, 康尔泗, 杨建平, 等. 水文模型研究综述. 中国沙漠, 2003, 23(3): 15-23 [Chen R-S, Kang E-S, Yang J-P, et al. Research review of hydrological modeling. Journal of Desert Research, 2003, 23(3): 15-23]
[4] Perrin C, Michel C, Andréassian V. Does a large number of parameters enhance model performance? Compara-tive assessment of common catchment model structures on 429 catchments. Journal of Hydrology, 2001, 242: 275-301
[5] Ponce VM, Hawkins RH. Runoff curve number: Has it reached maturity? Journal of Hydrologic Engineering, 1996, 1: 11-19
[6] Tyagi JV, Mishra SK, Singh R, et al. SCS-CN based time-distributed sediment yield model. Journal of Hydrology, 2008, 352: 388-403
[7] Deshmukh DS, Chaube UC, Hailu AE, et al. Estimation and comparison of curve numbers based on dynamic land use land cover change, observed rainfall-runoff data and land slope. Journal of Hydrology, 2013, 492: 89-101
[8] Tessema SM, Lyon SW, Setegn SG, et al. Effects of different retention parameter estimation methods on the prediction of surface runoff using the SCS curve number method. Water Resources Management, 2014, 28: 3241-3254
[9] Mishra SK, Chaudhary A, Shrestha, et al. Experimental verification of the effect of slope and land use on SCS runoff curve number. Water Resources Management, 2014, 28: 3407-3416
[10] US Department of Agriculture-Soil Conservation Service. National Engineering Handbook, Section 4: Hydrology. Washington DC, USA: US Department of Agriculture, 1972
[11] Elhakeem M, Papanicolaou AN. Estimation of the runoff curve number via direct rainfall simulator measurements in the state of Iowa, USA. Water Resources Management, 2009, 23: 2455-2473
[12] Mishra SK, Sahu RK, Eldho TI, et al. An improved I_a-S relation incorporating antecedent moisture in SCS-CN methodology. Water Resources Management, 2006, 20: 643-660
[13] 周淑梅, 雷廷武. 黄土丘陵沟壑区典型小流域SCS-CN方法初损率取值研究. 中国农业科学, 2011, 44(20): 4240-4247 [Zhou S-M, Lei T-W. Calibration of SCS-CN initial abstraction ratio of a typical small watershed in the Loess Hilly-Gully region. Scientia Agricultura Sinica, 2011, 44(20): 4240-4247]
[14] 邓景成, 高鹏, 穆兴民, 等. 模拟降雨条件下黄土区SCS模型的参数率定. 水土保持研究, 2018, 25(5): 205-210 [Deng J-C, Gao P, Mu X-M, et al. Study on calibrating parameters of SCS model in Loess area under simulated rainfall. Research of Soil and Water Conservation, 2018, 25(5): 205-210]
[15] 赵允格, 许明祥, 王全九, 等. 黄土丘陵区退耕地生物结皮理化性状初报. 应用生态学报, 2006, 17(8): 1429-1434 [Zhao Y-G, Xu M-X, Wang Q-J, et al. Physical and chemical properties of soil bio-crust on rehabilitated grassland in hilly Loess Plateau of China. Chinese Journal of Applied Ecology, 2006, 17(8): 1429-1434]
[16] Rodríguez-Caballero E, Cantón Y, Chamizo S, et al. Effects of biological soil crusts on surface roughness and implications for runoff and erosion. Geomorphology, 2012, 145/146: 81-89
[17] Liu F, Zhang GH, Sun L, et al. Effects of biological soil crusts on soil detachment process by overland flow in the Loess Plateau of China. Earth Surface Processes and Landforms, 2016, 41: 875-883
[18] Kidron GK, Wang Y, Herzberg M. Exopolysaccharides may increase biocrust rigidity and induce runoff generation. Journal of Hydrology, 2020, 588: 125081
[19] 谷康民, 杨凯, 赵允格, 等. 黄土丘陵区不同盖度生物结皮对坡面产流及SCS-CN模型CN值的影响. 水土保持学报, 2021, 35(1): 132-137 [Gu K-M, Yang K, Zhao Y-G, et al. Effects of biological soil crusts’ coverage on slope runoff and the CN value of SCS-CN model in hilly Loess Plateau region. Journal of Soil and Water Conservation, 2021, 35(1): 132-137]
[20] Prakash P. Grazing management in temperate grassland of Kumaun Himalaya for soil water conservation. Journal of Applied and Natural Science, 2013, 5: 345-349
[21] Fischer C, Roscher C, Jensen B, et al. How do earthworms, soil texture and plant composition affect infiltration along an experimental plant diversity gradient in grassland? PLoS One, 2014, 9(2): e98987
[22] 赵允格, 许明祥, 王全九, 等. 黄土丘陵区退耕地生物结皮对土壤理化性状的影响. 自然资源学报, 2006, 21(3): 441-448 [Zhao Y-G, Xu M-X, Wang Q-J, et al. Impact of biological soil crust on soil physical and chemical properties of rehabilitated grassland in hilly Loess Plateau, China. Journal of Natural Resources, 2006, 21(3): 441-448]
[23] 水利部水文局. 水文情报预报规范: GB/T 22482—2008. 北京: 中国标准出版社, 2000 [Bureau of Hydrology, Ministry of Water Resources. Standard for Hydrologic Information and Hydrological Forecasting: GB/T 22482-2008. Beijing: China Standards Press, 2000]
[24] 徐赞, 吴磊, 吴永祥, 等. SCS-CN模型改进及其径流预测. 水利水运工程学报, 2018(3): 32-39 [Xu Z, Wu L, Wu Y-X, et al. Improvement and runoff prediction of SCS-CN model. Hydro-science and Engineering, 2018(3): 32-39]
[25] 孙福海, 肖波, 张鑫鑫, 等. 黄土高原生物结皮覆盖对土壤积水入渗特征的影响及其模型模拟. 西北农林科技大学学报: 自然科学版, 2020, 48(10): 82-91 [Sun F-H, Xiao B, Zhang X-X, et al. Effects of biocrusts covering on soil water infiltration characteristics on the Loess Plateau and its simulation. Journal of Northwest A&F University: Natural Science, 2020, 48(10): 82-91]
[26] 李宁宁, 张光辉, 王浩, 等. 黄土丘陵沟壑区生物结皮对土壤抗蚀性能的影响. 中国水土保持科学, 2020, 18(1): 42-48 [Li N-N, Zhang G-H, Wang H, et al. Soil anti-erodibility influenced by biological crusts in Loess Hilly and Gully region. Science of Soil and Water Conservation, 2020, 18(1): 42-48]
[27] 杨凯, 赵军, 赵允格, 等. 生物结皮坡面不同降雨历时的产流特征. 农业工程学报, 2019, 35(23): 135-141 [Yang K, Zhao J, Zhao Y-G, et al. Characteristics of runoff on biological soil crust slope in different rainfall durations. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(23): 135-141]
[28] 秦宁强, 赵允格. 生物土壤结皮对雨滴动能的响应及削减作用. 应用生态学报, 2011, 22(9): 2259-2264 [Qin N-Q, Zhao Y-G. Responses of biological soil crust to and its relief effect on raindrop kinetic energy. Chinese Journal of Applied Ecology, 2011, 22(9): 2259-2264]
[29] 张鑫, 张青峰, 周阳阳, 等. 不同坡度黄土微地形条件下SCS-CN模型参数研究. 水土保持研究, 2019, 26(2): 74-77 [Zhang X, Zhang Q-F, Zhou Y-Y, et al. SCS-CN parameter determination using rainfall-runoff data on microtopographic surfaces of different gradient loess slopes. Research of Soil and Water Conservation, 2019, 26(2): 74-77]