Study on sand fixation based on RWEQ and NPP in the Three-River headwaters region

doi:10.14088/j.cnki.issn0439-8114.2019.10.011

Abstract

Abstract: The sand-fixing amount and NPP were evaluated in the Three-River headwaters region in 2015 based on RWEQ model and improved CASA model respectively, and the relationship between them explored using the grid. The results showed that the potential wind erosion and actual wind erosion degree in this area were high in the west and low in the east as a whole, and the sand-fixing amount was high in the middle and low in the west and the east. The average sand fixation amount was 29.51 kg/m², and the soil wind erosion was at the middle level. Contrary to the soil wind erosion, the spatial distribution characteristic of NPP was high in the east and low in the west. There was a linear relationship between the amount of potential wind erosion and NPP（R²=0.47）, while the actual wind erosion and NPP showed a significant exponential relationship （R²=0.91）. In addition, with the increase of NPP, the sand-fixing capacity firstly increased and then decreased. At the maximum of sand-fixing capacity, NPP was about 300 gC/m².

Key words: RWEQ, sand fixation, NPP, correlation analysis, the Three-River headwaters region

CLC Number:

Q14
Q948

HE Qian, DAI Xiao-ai. Study on sand fixation based on RWEQ and NPP in the Three-River headwaters region[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(10): 45-50.

References

[1] 傅伯杰,于丹丹,吕楠.中国生物多样性与生态系统服务评估指标体系[J].生态学报,2017,37(2):341-348.
[2] 雷金睿,陈宗铸,吴庭天,等.海南岛东北部土地利用与生态系统服务价值空间自相关格局分析[J/OL].生态学报,2019,39(7).http://dx.doi.org/10.5846/stxb201803090468.
[3] 侯鹏,王桥,杨旻,等.生态保护红线成效评估框架与指标方法[J].地理研究,2018,37(10):1927-1937.
[4] 武志涛,马志婷,郭未旭,等.晋北沙漠化地区土壤风蚀动态及防治效果[J].水土保持通报,2016,36(6):8-14.
[5] 杨秀春. 旱作农田土壤风蚀防治的保护性耕作技术研究[D].北京:北京师范大学,2004.
[6] 姜萍,徐洁,陈鹏翔,等.南疆近57年沙尘暴变化特征分析[J].干旱区资源与环境,2019,33(2):103-109.
[7] JIANG C,LI D Q,WANG D W,et al.Quantification and assessment of changes in ecosystem service in the Three-River Headwaters Region,China as a result of climate variability and land cover change[J].Ecological indicators,2016,66:199-211.
[8] 张振宇,钟瑞森,李小玉,等.中国西北地区NPP变化及其对干旱的响应分析[J].环境科学研究,2019,32(3):431-439.
[9] GAO Y H,ZHOU X,WANG Q,et al.Vegetation net primary productivity and its response to climate change during 2001-2008 in the Tibetan Plateau[J].Science of the total environment,2013,444:356-362.
[10] YE X C,MENG Y K,XU L G,et al.Net primary productivity dynamics and associated hydrological driving factors in the floodplain wetland of China's largest freshwater lake[J].Science of the total environment,2019,659:302-313.
[11] 李惠梅,张安录.基于结构方程模型的三江源牧户草地生态环境退化认知研究[J].草地学报,2015,23(4):679-688.
[12] 秦嘉龙,尹晓英,曾永良.三江源水土保持生态效益评价研究[J].生态经济,2015,31(1):180-184.
[13] 强安丰,魏加华,解宏伟.青海三江源地区气温与降水变化趋势分析[J].水电能源科学,2018,36(2):10-14.
[14] SHEN X J,AN R,FENG L,et al.Vegetation changes in the Three-River Headwaters Region of the Tibetan Plateau of China[J].Ecological indicators,2018,93:804-812.
[15] 许茜,李奇,陈懂懂,等.近40 a三江源地区土地利用变化动态分析及预测[J].干旱区研究,2018,35(3):695-704.
[16] 韦晶,郭亚敏,孙林,等.三江源地区生态环境脆弱性评价[J].生态学杂志,2015,34(7):1968-1975.
[17] 曹巍,刘璐璐,吴丹.三江源区土壤侵蚀变化及驱动因素分析[J].草业学报,2018,27(6):10-22.
[18] 武晓宇,董世魁,刘世梁,等.基于MaxEnt模型的三江源区草地濒危保护植物热点区识别[J].生物多样性,2018,26(2):138-148.
[19] 吴丹,邵全琴,刘纪远,等.三江源地区林草生态系统水源涵养服务评估[J].水土保持通报,2016,36(3):206-210.
[20] 闫敏,李增元,田昕,等.黑河上游植被总初级生产力遥感估算及其对气候变化的响应[J].植物生态学报,2016,40(1):1-12.
[21] 石磊,马俊飞,杨太保.基于“GIS/RS”技术的三江源地区生态环境建设的研究[J].水土保持研究,2005,12(4):212-214.
[22] 廖顺宝,李泽辉,游松财.气温数据栅格化的方法及其比较[J].资源科学,2003,25(6):83-88.
[23] 巩国丽,刘纪远,邵全琴.草地覆盖度变化对生态系统防风固沙服务的影响分析——以内蒙古典型草原区为例[J].地球信息科学学报,2014,16(3):426-434.
[24] FRYREAR D W,BILBRO J D,SALEH A,et al.RWEQ:Improved wind erosion technology[J].Journal of soil & water conservation,2000,55(2):183-189.
[25] 迟文峰,白文科,刘正佳,等.基于RWEQ模型的内蒙古高原土壤风蚀研究[J].生态环境学报,2018,27(6):1024-1033.
[26] POTTER C S,RANDERSON J T,FIELD C B,et al.Terrestrial ecosystem production:A process model based on global satellite and surface data[J].Global biogeochemical cycles,1993,7(4):811-841.
[27] 张锦水,潘耀忠,朱文泉.中国陆地植被净初级生产力遥感估算[J].植物生态学报,2007,31(3):413-424.
[28] 韩继冲,喻舒琳,杨青林,等.1999-2015年长江流域上游植被覆盖特征及其对气候和地形的响应[J/OL].长江科学院院报.[2019-01-20].http://kns.cnki.net/kcms/detail/42.1171.TV.20180720.0900.002.html.
[29] 黄玫,季劲钧,彭莉莉.青藏高原1981~2000年植被净初级生产力对气候变化的响应[J].气候与环境研究,2008,13(5):608-616.
[30] 王作全. 三江源区生态环境保护法治化研究[M].北京:北京大学出版社,2007.