| 黄土高原生物结皮对 SCS⁃CN 模型初损率的影响 |
| 谷康民1,2; 赵允格2; 高丽倩2; 杨凯1,2; 孙会2,3
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| 2021
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发表期刊 | 应用生态学报
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卷号 | 32期号:12页码:4186-4194 |
摘要 | 水文模型是水文过程研究的有效工具,初损率(λ)是径流模型 SCS⁃CN 模型的参数,
对模拟流域水文过程具有重要意义。 为了确定生物结皮对 λ 的影响,提高该模型在黄土高原
生物结皮广泛分布的退耕地的预测精度,本研究以陕西省定边县鹰窝山涧流域不同盖度的生
物结皮坡面为对象,采用模拟降雨试验,分析土壤潜在最大入渗量(S)与实际入渗量(F)的关
系,以及生物结皮盖度对 λ 的影响,并修订了 λ;在此基础上,采用陕西省安塞县纸坊沟流域
生物结皮径流小区的模拟降雨试验数据校验了参数修订后的模型。 结果表明: 生物结皮坡
面 S 与 F 的关系式为: S/ F = 2.5×60/ T(其中 T 为降雨历时);模型参数 λ 与生物结皮盖度
(C BSC )呈极显著负相关关系,二者关系式为: λ=0.0791×e (-0.015×C BSC ) ,R 2 =0.60;较 λ 取标准值,
依生物结皮盖度修订 λ 后,SCS⁃CN 模型 Nash 效率系数提高 338.7%,合格率提升 16.1%。 研
究结果为黄土高原生物结皮坡面 λ 的确定提供了科学依据,对准确评估黄土高原退耕还林
(草)工程的水文效应具有重要意义。 |
其他摘要 | 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 biologi⁃
cal soil crusts (biocrusts) on λ and improve the accuracy of the model used in the restored grass⁃
lands where biocrusts widely presented in the Loess Plateau region, we firstly determined the rela⁃
tionship 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 re⁃
vised 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 ) , R 2 =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. |
关键词 | 生物结皮
盖度
SCS⁃CN 模型
初损率
径流模型
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收录类别 | 中文核心期刊要目总览
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语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/10396
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专题 | 水保所知识产出(1956---)
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作者单位 | 1.西北农林科技大学资源环境学院 2.西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业 国家重点实验室 3.西北农林科技大学林学院
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推荐引用方式 GB/T 7714 |
谷康民,赵允格,高丽倩,等. 黄土高原生物结皮对 SCS⁃CN 模型初损率的影响[J]. 应用生态学报,2021,32(12):4186-4194.
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APA |
谷康民,赵允格,高丽倩,杨凯,&孙会.(2021).黄土高原生物结皮对 SCS⁃CN 模型初损率的影响.应用生态学报,32(12),4186-4194.
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MLA |
谷康民,et al."黄土高原生物结皮对 SCS⁃CN 模型初损率的影响".应用生态学报 32.12(2021):4186-4194.
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黄土高原生物结皮对SCS-CN模型初损率的影响_谷康民.pdf
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