[1]申华珍,王春梅*,庞国伟,等.黄土切沟沟头位置地形临界模型及不同土地利用下的参数差异[J].山地学报,2024,(2):174-184.[doi:10.16089/j.cnki.1008-2786.000814]
　SHEN Huazhen,WANG Chunmei*,PANG Guowei,et al.Topographical Critical Model of Loess Gully Head and Its Parameter Determination in Different Land Use Contexts[J].Mountain Research,2024,(2):174-184.[doi:10.16089/j.cnki.1008-2786.000814]
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黄土切沟沟头位置地形临界模型及不同土地利用下的参数差异
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2024年第2期
页码:
174-184
栏目:
山地环境
出版日期:
2024-03-25

文章信息/Info

Title:
Topographical Critical Model of Loess Gully Head and Its Parameter Determination in Different Land Use Contexts
文章编号:
1008-2786-(2024)2-174-11
作者:
申华珍; 王春梅*; 庞国伟; 龙永清; 王 雷; 王 强; 杨勤科
(西北大学 a. 城市与环境学院; b. 陕西省地表系统与环境承载力重点实验室,西安 710127; c. 旱区生态水文与灾害防治国家林业和草原局重点实验室,西安 710048)
Author(s):
SHEN Huazhen; WANG Chunmei*; PANG Guowei; LONG Yongqing; WANG Lei; WANG Qiang; YANG Qinke
(a. College of Urban and Environmental Sciences; b. Shaanxi Key Laboratory Earth Surface System and Environmental Carrying Capacity, Northwest University, Xi'an 710127, China; c. Key Laboratory of National Forestry and Grassland Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi'an 710048, China)
关键词:
无人机;  切沟;  地形临界;  土地利用;  黄土高原
Keywords:
Unmanned Aerial Vehicle(UAV);  gully;  topographical criticality;  land use;  the Loess Plateau
分类号:
S157.1
DOI:
10.16089/j.cnki.1008-2786.000814
文献标志码:
A
摘要:
切沟侵蚀是黄土高原地区重要侵蚀形式。切沟的发生存在一定的地形临界,坡度-汇水面积(Slope-Area)临界模型是切沟沟头位置模拟与预测的常用方法,对模型参数的空间分异及其不同土地利用下的参数差异的规律认识不足极大限制了该临界模型的实际应用。本研究以典型黄土丘陵沟壑区陕北岔巴沟流域为研究区,采用无人机航摄并结合野外实测,研究了S-A临界模型参数的空间分异及其不同土地利用下的参数差异。结果表明:(1)切沟沟头坡度从上游到下游呈递增趋势,沟头汇水面积呈递减趋势。(2)岔巴沟流域S-A临界模型切沟发生的临界常数a值和模型指数b从上游到下游变化不大,均呈轻微递增趋势,流域内切沟沟头发生的临界模型空间分异性不明显。岔巴沟流域上游、中游和下游的切沟沟头S-A临界模型参数a分别为1.006、1.128和1.157,参数b分别为0.197、0.203和0.209。(3)切沟沟头S-A临界模型参数受土地利用类型的影响较大。坡耕地切沟S-A临界模型参数a和b分别为0.810和0.159,林草地切沟临界模型参数a和b分别为2.007和0.341。林草地切沟沟头S-A临界模型常数a是坡耕地的近2.5倍,指数b是坡耕地的近2倍。本研究深化了对黄土丘陵沟壑区切沟沟头发生的地形临界条件的认识,提升了S-A临界模型在黄土切沟治理实践中的可用性,将有效支撑黄土高原侵蚀精准治理。
Abstract:
Gully erosion is a primary form of land degradation in the Loess Plateau region. There is a certain topographic criticality to the occurrence of loess gully erosion at gully head. S-A(Slope-Area)critical model is a common method for simulating and predicting gully head development; however, the insufficient understanding in the spatial differentiation of the model parameters and improper parameter determining in different land use contexts inhibited the model from extensive application.
In this study, Unmanned Aerial Vehicle(UAV)photography combined with field survey was used to investigate the Chabagou valley, a typical loess hilly area in northern Shaanxi, China for examination of S-A critical model regarding the spatial differentiation of the model parameters and parameter determination in different land use contexts.
(1)The slope gradients at gully heads increased from upstream to downstream, while the drainage area of gully heads showed a decreasing trend.
(2)As the S-A critical model for the Chabagou valley, critical constant a were 1.006, 1.128, and 1.157 at gully heads in the upstream, midstream, and downstream of the valley, respectively, and correspondingly model exponent b were 0.197, 0.203, and 0.209, respectively. It was noticeable that both critical constant a and model exponent b values did not vary to a great extent, exhibiting a slight increasing trend from upstream to downstream, without significant spatial differentiation in model parameters at gully heads.
(3)S-A critical model parameters for gully heads was subject to land use types. It had 0.810, 2.007 for a and b in sloping farmland, respectively, and 0.159 and 0.341 for a and b in forest-grass land, respectively. The critical constant a for forest-grass land was nearly 2.5 times higher than that of sloping farmland, while the exponent b was nearly 2 times higher that of sloping cropland.
This study deepens the understanding of the topographic critical conditions for the occurrence of gully erosion in loess hilly gullies, and enhances the availability of S-A critical model in loess erosion management practice, and would effectively support the precise management of erosion on the Loess Plateau.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2023-10-14; 改回日期(Accepted date):2024- 04-14
基金项目(Foundation item): 国家自然科学基金(41977062)。 [National Natural Science Foundation of China(41977062)]
作者简介(Biography): 申华珍(1999-),男,山东济宁人,硕士研究生,主要研究方向:土壤侵蚀空间分异。 [SHEN Huazhen(1999-), male, born in Jining, Shandong province, M.Sc. candidate, research on spatial differentiation of soil erosion] E-mail: 202133186@stumail.nwu.edu.cn
*通讯作者(Corresponding author): 王春梅(1983-),女,博士,教授,主要研究方向:遥感与GIS应用、土壤侵蚀调查与模拟。 [WANG Chunmei(1983-), female, Ph.D., professor, research on remote sensing and GIS applications, soil erosion investigationand simulation] E-mail: cmwang@nwu.edu.cn
更新日期/Last Update: 2024-03-30