[1]马正虎,璩向宁,赵希妮,等.宁夏沙湖南岸沙丘沙粒度特征及其成因分析[J].水土保持研究,2019,26(06):267-273,279.
　MA Zhenghu,QU Xiangning,ZHAO Xini,et al.Grain Size Characteristics and Genesis Analysis of Sand Dunes on the South Bank of Lake Shahu in Ningxia[J].Research of Soil and Water Conservation,2019,26(06):267-273,279.
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宁夏沙湖南岸沙丘沙粒度特征及其成因分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年06期 页码: 267-273,279 栏目: 出版日期: 2019-10-17
Title:
Grain Size Characteristics and Genesis Analysis of Sand Dunes on the South Bank of Lake Shahu in Ningxia
作者:
马正虎1,2, 璩向宁1,2, 赵希妮1,2, 刘雅清1,2, 何志润1,2
1. 宁夏大学 西北土地退化与生态系统恢复省部共建国家重点实验室培育基地, 银川 750021;
2. 宁夏大学 西北退化生态系统恢复与重建教育部重点实验室, 银川 750021
Author(s):
MA Zhenghu1,2, QU Xiangning1,2, ZHAO Xini1,2, LIU Yaqing1,2, HE Zhirun1,2
1. State Key Laboratory Breeding Base of Land Degradation and Ecosystem Restoration, Ningxia University, Yinchuan 750021, China;
2. Key Laboratory of Northwest Degraded Ecosystem Restoration and Reconstruction, Ministry of Education, Ningxia University, Yinchuan 750021, China
关键词:
沙丘沙; 粒度特征; 成因分析; 宁夏沙湖
Keywords:
sand dunes; granularity characteristics; causes; Lake Shahu of Ningxia
分类号:
P931.3
摘要:
沙丘粒度特征能够反映物质沙源、搬运、分选作用以及沙丘形成过程中的风力强度，同时还能体现地形及人类活动等对风沙流运移的影响等。通过对沙湖南岸线型沙丘链分0-5 cm，20-25 cm，25-50 cm采样、应用相关分析、McManus矩值法等对粒度进行分析。结果表明：其粒度组分以极细沙（33.72%~64.52%）和细沙（29.12%~64.39%）为主，不含粗沙、极粗沙，黏土仅存在于迎风坡向东延伸的采样带，各个部位深层较浅层粒度偏细。粒度参数特征表明，沙脊线平均粒径值显著高于其它部位。分选性在沙丘不同部位以及不同深度都较好。沙脊线及对照区部分偏度粗偏，其它部位均细偏。峰度则偏窄且大部分属于极窄峰态（Kgφ>1.5），沙丘发育较成熟。上述结果表明，沙湖南岸沙丘粒度组分主要是细沙和极细沙，其沙源主要源于本底起沙；同时，风力作用、沉积环境以及人为因素等在沙丘形成与发展过程中亦产生了重要影响。
Abstract:
The grain size characteristics of sand dune can reflect the sand source, transportation, sort and wind intensity during the formation of sand dunes, and can also reflect the influence of terrain and human activities on the movement of sand flow. Through sampling the samples in the depths of 0-5 cm, 20-25 cm, 25-50 cm along the linear dune chain on the south bank of Lake Shahu, the correlation analysis and McManus (1988) moment method were used for particle size analysis. The results show that the particle size components are mainly fine sand (33.72%~64.52%) and fine sand (29.12%~64.39%), and do not contain coarse sand and very coarse sand, the clay only exists in the eastward extension of the windward slope, particle size of the deeper layer is finer than that of the shallow layer in each part. The characteristics of the particle size parameters indicate that the average grain size of the sand ridge line is significantly higher than that of the other parts. Sorting is better in different parts of the dune and at different depths. The partial deviation of the sand ridge line and the control area was coarse and partial, and other parts were finely biased. The kurtosis is narrow and most of them belong to the extremely narrow kurtosis (Kgφ>1.5), and the dune is more mature. The results show that the grain size components of sand dunes on the south bank of Lake Shahu are mainly fine sand and very fine sand, and the sand source is mainly from local sandy area. At the same time, wind force, sedimentary environment and human factors are also the important influences on processes of the formation and development of sand dunes.

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备注/Memo

收稿日期:2019-03-10;改回日期:2019-04-10。
基金项目:宁夏回族自治区环境保护科学项目（2014014）；宁夏回族自治区西部一流学科建设项目（NXYLXK2017B06）
作者简介:马正虎(1992-),男,甘肃白银人,硕士研究生,主要从事生态监测与环境变化研究。E-mail:18595128095@163.com
通讯作者:璩向宁(1963-),男,河北景县人,教授,主要从事生态环境变化与监测评估等方面研究。E-mail:13909599852@163.com

更新日期/Last Update: 1900-01-01