img

官方微信

高级检索
作者投稿 专家审稿 编辑办公

摘要:

鄱阳湖沙地是亚热带湿润区典型风沙化土地,土地沙化问题严峻。鄱阳湖沙地研究多在小范围开展,研究意义有限,应在多处进行沙地粒度比对研究。选取庐山市、都昌县、永修县和南昌市新建区等沙地样品57个,分析其粒度特征。结果表明:(1)鄱阳湖沙地主要由中沙、细沙和粗沙组成,三者总含量超90%;Mz均值为1.79 Φ,分选较差,呈正偏和尖锐分布;(2)鄱阳湖沙地不同土地类型沉积物表层(0—5 cm)与20—40 cm深度粒度特征存在一定差异,固定沙丘、半固定沙丘、流动沙丘和河滩表层比20—40 cm深度粒径大,但流动沙丘和湿地草滩表层分选优于20—40 cm深度;湿地草滩和河滩优势粒级含量和粒度参数有别于沙丘;(3)鄱阳湖沙地固定沙丘、半固定沙丘和流动沙丘为风成沉积;河滩以河流作用为主,风蚀为辅;湿地草滩是在风力和水动力共同作用下形成的。鄱阳湖沙地沿盛行风向从南到北SdSKKg依次减小,风沙运动多以两跳一悬式为主,以就地起沙为主,河滩湖滩作为补充。

关键词: 沙地, 粒度, 影响因素, 鄱阳湖

Abstract:

The sandy land around the Poyang Lake is a typical sandy land in subtropical humid region. The problem of land desertification is serious, and has always been a research hotspot. However, there is little significance for the study of sandy land around the Poyang Lake because it is concentrated in a small area. Hence, it is extremely important to study the grain size comparison based onf a lot of sampling points around the Poyang Lake. In this paper, 57 sand samples were selected from Lushan City, Duchang County, Yongxiu County and Xinjian District, etc, and their grain size characteristics were analyzed. The results showed that: (1) The sandy land around the Poyang Lake is mainly composed of medium sand, fine sand and coarse sand, and the content of the three sand is more than 90%.The mean value of Mz is 1.79 Φ, and the sorting is poor with positive deviation and sharp distribution. (2) The grain size characteristics of sediment surface layer and 20-40cm depth were different in different sandy land types around the Poyang Lake. The surface layer of fixed dune, semifixed dune, active sand dune, wetland grass beach and benchland were coarser grain size than those of 20-40 cm depth, but the surface layers of active sand dune and wetland grass beach were better sorting than those of 20-40 cm depth. The dominant grain size content and grain size parameters of wetland grass beach and benchland are different from those of dune. (3) The fixed dune, semifixed dune and active sand dune are eolian deposits around the Poyang Lake. The benchland is dominated by fluvial action and supplemented by wind erosion.The wetland grass beach is formed under the combined wind force and hydrodynamic force. The SdSK and Kg of sandy land decreased from south to north along the prevailing wind direction. The aeolian sand movement of the Poyang Lake is mainly two jumps and one suspension style, and the main source of aeolian sand is on the spot, supplemented by river beach and lake beach.

Key words: sandy land, particle size, influencing factors, Poyang Lake

中图分类号: 

  • P931.3

深圳SEO优化公司大同网站搭建哪家好吉祥网络营销推荐马鞍山推广网站报价晋城关键词排名包年推广价格海南网站建设设计价格无锡关键词按天计费报价新余外贸网站制作公司绵阳网络营销多少钱宿迁网站seo优化多少钱吉祥优秀网站设计公司长沙设计公司网站报价汉中企业网站设计价格延边网站优化按天计费宝鸡阿里店铺运营推荐乌海品牌网站设计多少钱聊城网站优化推广公司成都百姓网标王推广推荐榆林网页制作哪家好通辽设计公司网站哪家好内江企业网站制作公司枣庄百度标王报价包头网站制作价格白银百度网站优化排名推荐濮阳外贸网站设计价格铁岭网站优化推广多少钱汕头模板网站建设公司霍邱百度seo多少钱龙岩百搜标王公司内江seo网站推广哪家好亳州网站设计哪家好歼20紧急升空逼退外机英媒称团队夜以继日筹划王妃复出草木蔓发 春山在望成都发生巨响 当地回应60岁老人炒菠菜未焯水致肾病恶化男子涉嫌走私被判11年却一天牢没坐劳斯莱斯右转逼停直行车网传落水者说“没让你救”系谣言广东通报13岁男孩性侵女童不予立案贵州小伙回应在美国卖三蹦子火了淀粉肠小王子日销售额涨超10倍有个姐真把千机伞做出来了近3万元金手镯仅含足金十克呼北高速交通事故已致14人死亡杨洋拄拐现身医院国产伟哥去年销售近13亿男子给前妻转账 现任妻子起诉要回新基金只募集到26元还是员工自购男孩疑遭霸凌 家长讨说法被踢出群充个话费竟沦为间接洗钱工具新的一天从800个哈欠开始单亲妈妈陷入热恋 14岁儿子报警#春分立蛋大挑战#中国投资客涌入日本东京买房两大学生合买彩票中奖一人不认账新加坡主帅:唯一目标击败中国队月嫂回应掌掴婴儿是在赶虫子19岁小伙救下5人后溺亡 多方发声清明节放假3天调休1天张家界的山上“长”满了韩国人?开封王婆为何火了主播靠辱骂母亲走红被批捕封号代拍被何赛飞拿着魔杖追着打阿根廷将发行1万与2万面值的纸币库克现身上海为江西彩礼“减负”的“试婚人”因自嘲式简历走红的教授更新简介殡仪馆花卉高于市场价3倍还重复用网友称在豆瓣酱里吃出老鼠头315晚会后胖东来又人满为患了网友建议重庆地铁不准乘客携带菜筐特朗普谈“凯特王妃P图照”罗斯否认插足凯特王妃婚姻青海通报栏杆断裂小学生跌落住进ICU恒大被罚41.75亿到底怎么缴湖南一县政协主席疑涉刑案被控制茶百道就改标签日期致歉王树国3次鞠躬告别西交大师生张立群任西安交通大学校长杨倩无缘巴黎奥运

深圳SEO优化公司 XML地图 TXT地图 虚拟主机 SEO 网站制作 网站优化