在野外实地考察和测量的基础上，沿盛行风向，对西辽河平原西部响水河中游右岸普遍发育的新月形沙丘链进行样品采集。经室内激光粒度仪测定，研究了河岸沙丘粒度分布规律。结果表明：（1）响水河右岸沙丘及丘间地以中沙为主，而河谷谷底细沙含量最多，平沙地次之。（2）滨岸沙丘由迎风坡脚到丘顶平均粒径变小，远岸沙丘由迎风坡脚到丘顶平均粒径变大；多数沙丘分选性由两侧坡脚到丘顶变好；多数沙丘丘顶偏度值和峰态值大于两侧坡脚。（3）滨岸沙丘受风、水两相作用，能从较深地层获得沙源；其下风向沙丘主要受风力作用，沙源主要为丘间地沙及上风向风沙流携带的较细沙。
Ninety four samples from surface of typical barchans chains on the right bank of the mid-Xiangshui River in the Xiliaohe Plain were collected along the prevailing wind direction. Distribution law of grain size was studied by Laser particle analyzer. Combining with field observation, the results were obtained as follows: (1) The sand dunes and interdunes on the right bank of the mid-Xiangshui River are mainly composed of medium sand, and it is fine sand for that in the bottom of valley. (2) The grain size of dunes adjacent to the valley appears thinner from stoss toe to the summit, while the grain size of dunes away from valley appears coarser from stoss toe to the slope top. The sorting becomes much better from both upwind and downwind toes to the dune tops. The skewness and kurtosis of sediment on the tops of dune are primarily larger than on the toes. (3) Due to the aeolian-fluvial interactions, sand dunes near valley can obtain rich sand source from underlying strata. However, downwind dunes acquire sand from interdunes and drifting fine sand by wind.
[1] 钱广强,董治宝,罗万银,等.巴丹吉林沙漠地表沉积物粒度特征及区域差异[J].中国沙漠,2011,31(6):1357-1364.
[2] 凌智永,李志忠,李廷伟.塔克尔莫乎尔沙漠抛物线形沙丘的粒度分布模式[J].中国沙漠,2014,34(2):325-331.
[3] 吴霞,哈斯,杜会石,等.库布齐沙漠南缘抛物线形沙丘表面粒度特征[J].沉积学报,2012,30(005):937-944.
[4] 张伟民.金字塔沙丘粒度变化及表面过程的初步研究[J].中国沙漠,2013,33(6):1615-1621.
[5] 邵天杰,赵景波,李恩菊,等.巴丹吉林典型高大沙山粒度分布规律研究[J].地理科学,2010,30(5):790-796.
[6] 李恩菊,董治宝,赵景波.巴丹吉林沙漠典型高大沙山迎风坡粒度特征[J].干旱区地理,2011,34(3):471-478.
[7] 胡凡根,李志忠,靳建辉,等.基于释光测年的福建晋江海岸沙丘粒度记录的风沙活动[J].地理学报,2013,68(3):343-356.
[8] Wang X M,Dong Z B,Zhang J W,et al.Grain size characteristics of dune sands in the central Taklimakan Sand Sea[J].Sedimentary Geology,2003,161(1):1-14.
[9] 周娜,张春来,刘永刚.雅鲁藏布江米林宽谷段新月形沙丘粒度分异研究[J].地理科学,2011,31(8):958-963.
[10] 董玉祥,马骏,黄德全.海岸新月形沙丘的表面粒度分异——以河北昌黎黄金海岸为例[J].海洋地质与第四纪地质,2008,28(3):15-21.
[11] 俞胜清,阿布都米基提,周向玲,等.新疆喀拉库姆沙漠新月形沙丘不同部位粒度特征[J].中国沙漠,2013,33(6):1629-1635.
[12] Bullard J E,Nash D J.Linear dune pattern variability in the vicinity of dry valleys in the southwest Kalahari[J].Geomorphology,1998,23(1):35-54.
[13] Bullard J E,McTainsh G H.Aeolian-fluvial interactions in dry land environments:examples,concepts and Australia case study[J].Progress in Physical Geography,2003,27(4):471-501.
[14] Maroulis J C,Nanson G C,Price D M,et al.Aeolian fluvial interaction and climate change:source-bordering dune development over the past～100 ka on Cooper Creek,central Australia[J].Quaternary Science Reviews,2007,26(3):386-404.
[15] 谢花林,李波,刘黎明,等.基于空间统计学和GIS的农牧交错带土壤养分空间特征分析——以内蒙古翁牛特旗为例[J].水土保持学报,2006,20(2):73-76.
[16] 宗芹.科尔沁沙地沙丘迎风坡面干沙层的空间分布[J].应用生态学报,2012,23(4):875-880.
[17] Lancaster N.Geomorphology of Desert Dunes[M].London,UK:Routaledge,1995:526.
[18] 李恒鹏,陈广庭,李波.新月形沙丘迎风坡气流加速模拟[J].中国沙漠,2001,21(1):24-27.
[19] 钱广强,董治宝,罗万银,等.回涡沙丘的形态特征与表面物质组成[J].中国沙漠,2012,32(3):587-592.
[20] 胡梦珺,李森,高尚玉,等.风成沉积物粒度特征及其反映的青海湖周边近32 ka以来土地沙漠化演变过程[J].中国沙漠,2012,32(5):1240-1247.
[21] 吴正.风沙地貌与治沙工程学[M].北京:科学出版,2003:196-201.
[22] 李森,王跃,哈斯,等.雅鲁藏布江河谷风沙地貌分类与发育问题[J].中国沙漠,1997,17(4):342-350.
甘公网安备 62010202000688号