[1]王 蕾,赵 霞,张琛悦,等.基于RWEQ模型的茫崖市防风固沙功能评估及敏感地类识别[J].水土保持研究,2023,30(01):144-153.[doi:10.13869/j.cnki.rswc.2023.01.024]
　WANG Lei,ZHAO Xia,ZHANG Chenyue,et al.Assessment of Windbreak and Sand Fixation Function and Identification of Sensitive Landuse Types in Mangai City Based on RWEQ Model[J].Research of Soil and Water Conservation,2023,30(01):144-153.[doi:10.13869/j.cnki.rswc.2023.01.024]
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基于RWEQ模型的茫崖市防风固沙功能评估及敏感地类识别

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 30 期数: 2023年01期 页码: 144-153 栏目: 出版日期: 2023-01-10
Title:
Assessment of Windbreak and Sand Fixation Function and Identification of Sensitive Landuse Types in Mangai City Based on RWEQ Model
文章编号:
1005-3409(2023)01-0144-10
作者:
王 蕾1,2, 赵 霞1,2, 张琛悦1,2, 唐文家3
(1.青海师范大学 青藏高原地表过程与生态保育教育部重点实验室, 西宁 810008; 2.高原科学与可持续发展研究院高原土壤信息科学研究团队, 西宁 810008; 3.青海省生态环境监测中心, 西宁 810007)
Author(s):
WANG Lei1,2, ZHAO Xia1,2, ZHANG Chenyue1,2, TANG Wenjia3
(1.Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation, ministry of Education, Qinghai Normal University, Xining 810008, China; 2.Academy of Plateau Science and Sustainability, Xining 810008, China; 3.Ecological Environment Monitoring Center of Qinghai Province, Xining 810007, China)
关键词:
修正风蚀模型;  气候因子;  防风固沙功能;  茫崖市
Keywords:
Revised Wind Erosion Equation Model;  climate factor;  windbreak and sand fixation function;  Mangai City
分类号:
P964; X826
DOI:
10.13869/j.cnki.rswc.2023.01.024
文献标志码:
A
摘要:
为了较准确评估茫崖市的防风固沙功能,识别对防风固沙功能敏感的土地利用类型,通过4种方法确定修正风蚀模型(RWEQ)中的气候因子(WF)参数,计算出实际风蚀量和防风固沙量,依据指南法、自然间断法和文献—实际结合法对防风固沙功能进行了评估分级,借助ArcGIS软件将土地利用类型和防风固沙功能进行空间叠置分析以识别出敏感地类。结果表明:(1)利用风蚀气候因子(Fq)直接代替法确定的WF空间分布和阈值范围最符合实际,RWEQ模型能较准确地评估荒漠戈壁区茫崖市的防风固沙功能;(2)茫崖市2014年平均风蚀模数为57.99 kg/(m2·a),属于风力侵蚀严重区域,2014年全市单位面积防风固沙量介于0～44.93 kg/m2,防风固沙功能整体较弱;(3)在3种评估分级方法中,文献—实际结合法更为详细地反映出2014—2018年茫崖市西南山区较强的防风固沙功能,且高等级功能的区域范围较广;(4)草地是茫崖市2014—2018年对防风固沙功能变化最敏感的土地利用类型。RWEQ模型有效评估了茫崖市的防风固沙功能,并识别出了敏感的土地利用类型。本研究为县级地区防风固沙功能评估技术的应用提供了科学参考。
Abstract:
For accurately evaluating the windbreak and sand fixation function of Mangai City and identifying the sensitive landuse types to the windbreak sand fixation function, this study determined the climatic factor(WF)in the Revised Wind Erosion Equation Model(RWEQ)through four methods, and calculated the amount of soil wind erosion and windbreak and sand fixation in Mangai City. Then, the windbreak and sand fixation function were evaluated and classified according to three methods such as the guideline method, the natural intermittent method and the literature-actuality combination method. Meanwhile, the sensitive landuse types to function changes through superposition the landuse types and spatial distribution of windbreak and sand fixation function were identified by ArcGIS. The results show that:(1)the spatial distribution and threshold range of WF obtained by using method of wind erosion climatic factors(Fq)directly to replace WF were most consistent with the reality; the RWEQ model can accurately evaluate the windbreak and sand fixation function of Mangai City;(2)in 2014, the average wind erosion modulus of Mangai City was 57.99 kg/(m2·a), belonged to the zone with strong wind erosion; the amount of windbreak and sand fixation per unit area of Manyai City in 2014 ranged from 0 to 44.93 kg/m2, with a weak windbreak and sand fixation function;(3)among three methods of assessment and classification, the literature-actuality combination method reflected the spatial variation of windbreak and sand fixation function in the mountainous area in southwest of Mangai City from 2014 to 2018; and the regional scope with high-level function was wide;(4)Grassland was the most sensitive landuse type to windbreak and sand fixation function changes of Mangai City from 2014 to 2018. The RWEQ model effectively evaluated the windbreak and sand fixation function of Mangai City, and identified sensitive landuse types. This study provides a scientific reference for the application of windbreak and sand fixation function evaluation technology on county scale.

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备注/Memo

收稿日期:2022-03-04 修回日期:2022-03-20
资助项目:国家第二次青藏高原综合考察项目任务三《土壤质量变化及其对生态系统的影响》专题(2019QZKK0306); 青海省重大科技专项(2019-SF-A12); 典型区域生态保护红线生态功能重要性变化评估项目(HT2019-03-003)
第一作者:王蕾(1994—),女,山西运城人,博士研究生,研究方向为资源环境与生态评估。E-mail:18234145683@163.com
通信作者:赵霞(1975—),女,青海贵德人,教授,主要从事资源环境与生态评估研究。E-mail:zhaoxia@qhnu.edu.cn

更新日期/Last Update: 2023-01-10