地理学报 ›› 2008, Vol. 63 ›› Issue (11): 1198-1206.doi: 10.11821/xb200811009

• 环境考古 • 上一篇    下一篇

北洛河中游黄陵洛川段全新世古洪水研究

姚平,黄春长,庞奖励,查小春,李晓刚   

  1. 陕西师范大学旅游与环境学院, 西安710062
  • 收稿日期:2008-05-08 修回日期:2008-09-04 出版日期:2008-11-25 发布日期:2010-08-03
  • 作者简介:姚平(1984-), 女, 硕士, 研究方向为资源开发与环境演变。E-mail: yaoping@stu.snnu.edu.cn
  • 基金资助:

    国家自然科学基金项目(40771018); 教育部博士点基金(20050718008); 陕西省自然科学基金项目 (2006D01); 中科院黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-176); 陕西师范大学优秀科技 预研项目(200702001)

Palaeoflood Hydrological Studies in the Middle Reaches of the Beiluohe River

YAO Ping, HUANG Chunchang, PANG Jiangli, ZHA Xiaochun, LI Xiaogang   

  1. College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062, China
  • Received:2008-05-08 Revised:2008-09-04 Online:2008-11-25 Published:2010-08-03
  • Supported by:

    National Natural Science Foundation of China, No.40771018; Doctoral Fund from the Ministry of Education, No.20050718008; Natural Science Foundation of Shaanxi, No.2006D01; CAS Key Lab Foundation, No.10501-176; Fund by Shaanxi Normal University, No.200702001

摘要:

通过在北洛河中游黄陵洛川段河谷的考察, 选择典型的古洪水平流沉积剖面进行了古 洪水水文学研究。在野外考察测量的基础上, 采集平流沉积层样品, 进行粒度成分、磁化率、 烧失量、CaCO3 含量等分析, 证明研究地点具有典型的古洪水平流沉积层, 并且通过地层学对比分析, 确定其为中晚全新世特大洪水的沉积物。利用水文学原理计算出该组古洪水沉积层所记录的特大洪水的洪峰流量在12 350 m3/s~14 730 m3/s 之间。同时通过对该断面下游方 向20 km 处的东王河铁路桥1994 年9 月洪水洪痕的测量, 利用相同方法计算其洪峰流量, 证明古洪水水文学计算结果合理可靠, 从而为北洛河中游的工程建设及沿岸地区的防洪减灾提供重要的数据资料。

关键词: 北洛河, 全新世, 古洪水, 平流沉积物, 古水文学

Abstract:

After the investigation on the middle reaches of the Beiluohe River, we chose the slackwater deposits for the palaeohydrology study, which were obvious along the bedrock gorge of the study reaches. On the basis of field survey, we collected samples of the slackwater deposits and analyzed the grain size distribution, the magnetic susceptibility variation, the loss on ignition and the content of calcium carbonate. All of these evidences showed that the slackwater deposits were typical in the study area, and we concluded that the corresponding palaeoflood occurred in the middle and late Holocene through the stratigraphic correlation. When we applied the hydrological technique to the slackwater deposits series, the reconstructed peak discharges of the palaeoflood recorded by them were 12350-14730 m3s-1. We also measured the muddy mark on the pier at the Dongwanghe cross at a distance of 20 km from the previous cross. The reconstructed peak discharge was 6670 m3s-1, which showed that the calculation of the palaeohydrolodgy was credible and reasonable. The results provide significant information for engineering construction, flood control and disaster alleviation in the middle reaches of the Beiluohe River.

Key words: Beiluohe River, Holocene, palaeoflood, Slackwater deposits, palaeohydrology