WANG Geng,ZHANG Hongyu.Study on the Spatial Difference of Radiation Effect of Sand-fixing in Northwest Liaoning Province[J].Research of Soil and Water Conservation,2022,29(06):161-166.
辽西北地区防风固沙辐射效应空间差异研究
- Title:
- Study on the Spatial Difference of Radiation Effect of Sand-fixing in Northwest Liaoning Province
- 文章编号:
- 1005-3409(2022)06-0161-06
- Keywords:
- Northwest Liaoning Province; wind domain ecosystems; sand-fixing function; spatial difference; radiation effect
- 分类号:
- X171.4
- 文献标志码:
- A
- 摘要:
- 为提高风域生态系统上风向与下风向区生态服务功能的协调与修复能力,基于修正风蚀方程(RWEQ)与GIS技术,并结合辽西北风域生态系统的风向、风速与土壤尘粒组成,评估分析了辽西北地区二期治沙工程后防风固沙功能的辐射效应。结果表明:受到气候、植被盖度、土壤类型、人类活动等诸多因素的影响,辽西北生态系统防风固沙功能具有空间地域差异性,整体呈现南北较强、中部较弱的空间分布格局。研究区防风固沙量为3.754×107 t,防风固沙能力为824.35 t/km2,产生辐射效应影响到的最远距离为1 250 km,辐射区总面积37.26 km2,是研究区自身面积的8.18倍。减少下风向区域的风沙量为1.877×107 t,其中延边朝鲜族自治州享受到的辐射效应最大,减少沙尘量为2.03×106 t,占总效应的10.82%; 伊春市享受的辐射效应最小,沙尘量减少1.1×103 t,占总效应的0.005%。总而言之,辽西北地区防风固沙功能空间分布差异性明显,风域生态系统防风固沙功能具有很强的辐射效应。
- Abstract:
- To improve the coordination and restoration ability of the upwind and downwind ecological service functions of the wind domain ecosystem, based on revised wind erosion equation(RWEQ)and GIS technology, combined with wind direction, wind speed and soil dust composition, the radiation effect of sand-fixing function after the second phase of sand control project in Northwest Liaoning Province was evaluated and analysed. The functions of the sand-fixing of wind domain ecosystems in Northwest Liaoning Province have spatial and regional differences due to the influence of climate, vegetation coverage, soil types, human activities, and the overall distribution pattern is stronger in the north and south, and weaker in the central region. The amount of sand-fixing in the study area was 3.754×107 t, the capacity of sand-fixing was 824.35 t/km2, the furthest distance affected by radiation effect is 1 250 km, the total area of the radiation area is 37.26 km2, which is 8.18 times of the study area itself. The amount of sand in the downwind area was reduced 1.877×107 t. Yanbian Korean Autonomous Prefecture experienced the largest radiation effect, with a reduction of 2.03×106 t of dust, accounting for 10.82% of the total effect. Yichun City experienced the least radiation effect, with a decrease of 1.1×103 t of dust, accounting for 0.005% of the total effect. In conclusion, there are obvious differences in the spatial distribution of sand-fixing functions in Northwest Liaoning, and the function of sand-fixing of wind region ecosystems has a strong radiation effect.
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相似文献/References:
[1]王蕊,张继权,曹永强,等.基于SEBS模型估算辽西北地区蒸散发及时空特征[J].水土保持研究,2017,24(06):382.
WANG Rui,ZHANG Jiquan,CAO Yongqiang,et al.Estimation of Evapotranspiration and Analysis of Temporal-Space Characteristic in Northwest of Liaoning Province Based on SEBS Model[J].Research of Soil and Water Conservation,2017,24(06):382.
备注/Memo
收稿日期:2021-09-15 修回日期:2021-10-15
资助项目:辽宁省教育厅自然科学基金“辽宁省生态产品空间分布特征、价值核算及生产能力分析”(LJ2020014)
第一作者:王耕(1973—),女,辽宁沈阳人,博士,教授,主要从事区域生态安全和可持续发展研究。E-mail:wanggeng@lnnu.edu.cn