In this research, the surface layer(0-3 cm) of different specifications PLA(Poly Lactic Acid) sand barriers in the northern Jilantai Salt Lake was selected to analyse the grain-size characteristics. The sediment particle size distributions were identified by using laser diffraction technique. The grain-size characteristics parameters, such as average particle size, sorting, skewness and kurtosis were determined, then calculated and analysed sand-fixation benefits of sand barriers. The results indicated that the sediment particle size was mainly made up of fine sand, medium sand and very fine sand. The medium sand, very fine sand and fine sand were the key factors that affected the sediment particle thickness in the sand barriers. The PLA sand barrier increased the content of medium sand and coarse sand, decreased the content of fine particles, and the sorting became worse, the kurtosis deviated from normal distribution and turned negative partial. The frequency distribution curves became wider, while the cumulative frequency curve became slow. The sediment particle size distributions tended to be coarsen. The sand drift activities inside the 1m 1m specification PLA sand barriers on the entire sand dune was deposition. The sand drift activities in 2m 2m and 3m 3m sand barriers at windward and leeward slope performed as deposition as well, while the top of sand dune was erosion. Considering laying costs and protective effects, 2m 2m was the best specification of PLA sand barriers for the study area.
Ding Yanlong
,
Gao Yong
,
Wang Ji
,
Sun Xiaorui
,
Dang Xiaohong
,
Han Yanlong
,
Li Peng
. Effects of Biodegradable Poly Lactic Acid Sand Barriers on Surface Sediment Grain-size Characteristics at Sand Dunes[J]. Journal of Desert Research, 2018
, 38(2)
: 262
-269
.
DOI: 10.7522/j.issn.1000-694X.2016.00156
[1] 秦大河,丁一汇,王绍武,等.中国西部环境演变及其影响研究[J].地学前缘,2002,9(2):321-328.
[2] 王涛,朱震达.我国沙漠化研究的若干问题——1.沙漠化的概念及其内涵[J].中国沙漠,2003,23(3):3-8.
[3] 董光荣,吴波,慈龙骏,等.我国荒漠化现状、成因与防治对策[J].中国沙漠,1999,14(4):22-36.
[4] 姚正毅,李晓英,肖建华.青海湖滨土地沙漠化驱动机制[J].中国沙漠,2015,35(6):1429-1437.
[5] 张克存,安志山,蔡迪文,等.沙漠-绿洲过渡带近地表风沙过程研究进展[J].地球科学进展,2015,30(9):1018-1027.
[6] 姚宏乐.敦煌-格尔木铁路高大沙丘区的风沙环境特征及风沙危害综合防护体系[J].中国沙漠,2015,35(3):555-564.
[7] 高永,邱国玉,丁国栋,等.沙柳沙障的防风固沙效益研究[J].中国沙漠,2004,24(3):111-116.
[8] 周娜,张春来,田金鹭,等.半隐蔽式草方格沙障凹曲面形成的流场解析及沉积表征[J].地理研究,2014,33(11):2145-2156.
[9] 汪言在,伍永秋,苟诗薇.塔克拉玛干沙漠中部地区两类半隐蔽格状沙障内部沉积粒度特征浅析[J].中国沙漠,2009,29(6):1056-1062.
[10] 吴正.风沙地貌与治沙工程学[M].北京:科学出版社,2010:315-316.
[11] Chepil W S.Factors that influence clod structure and erodibility of soil by wind Ⅱ.water-stable structure[J].Soil Science,1953,76(5):389-400.
[12] 谭立海,张伟民,屈建军,等.不同砾石覆盖度戈壁床面风蚀速率定量模拟[J].中国沙漠,2016,36(3):581-588.
[13] 董治宝,李振山.风成沙粒度特征对其风蚀可蚀性的影响[J].土壤侵蚀与水土保持学报,1998,4(4):2-6,13.
[14] Guan Q Y,Zhang J D,Wang L J,et al.Discussion of the relationship between dustfall grain size and the desert border,taking the southern border of the Tengger Desert and the southern dust deposit area as an example[J].Palaeogeography Palaeoclimatology Palaeoecology,2013,386(17):1-7.
[15] Folk R L,Ward W C.Brazos river bar:a study in the significance of grain size parameters[J].Journal of Sedimentary Petrology,1957,27(1):3-26.
[16] 唐丽,董玉祥.华南海岸现代风成沙与海滩沙的粒度特征差异[J].中国沙漠,2015,35(1):14-23.
[17] 马健,何元庆,冯起,等.黑河下游地区柽柳沙丘的气候与环境记录[J].中国沙漠,2016,36(2):319-326.
[18] 原伟杰,虞毅,岳永德,等.沙丘部位对聚乳酸纤维沙袋沙障降解速度的影响[J].干旱区资源与环境,2015,29(4):166-171.
[19] 党晓宏,高永,虞毅,等.新型生物可降解PLA沙障与传统草方格沙障防风效益[J].北京林业大学学报,2015,37(3):118-125.
[20] 李锦荣,孙保平,高永,等.基于空气动力学的沙袋沙障气流场模拟[J].北京理工大学学报,2010,30(6):749-752.
[21] 党晓宏,虞毅,高永,等.PLA沙障对沙丘土壤粒径的影响分析[J].水土保持研究,2014,21(3):16-19,24.
[22] 李谦.PLA沙障防风固沙效益的变化过程[D].呼和浩特:内蒙古农业大学,2012.
[23] 吉兰泰盐化集团公司志编纂领导小组.吉兰泰盐化集团公司志[M].呼和浩特:内蒙古人民出版社,2003.
[24] 高永,虞毅,汪季,等.一种可以分层采取土壤样品的取土器:中国,201926567U[P].2011-08-10.
[25] 丁国栋.风沙物理学[M].北京:中国林业出版社,2010.
[26] 成都地质学院陕北队.沉积岩(物)粒度分析及其应用[M].北京:地质出版社,1978:44-45.
[27] 闫玉春,唐海萍,张新时,等.基于土壤粒度分析的草原风蚀特征探讨[J].中国沙漠,2010,30(6):1263-1268.
[28] Bagnold R A.风沙和荒漠沙丘物理学[M].钱宁,林秉南,译.北京:科学出版社,1959.
