Estimation of Sediment Silting in River Channeldue to Developing Rare Earth Mine in Red Earth Region

SHI Hui; TIAN Feng; HUANG Lin; WANG Feng; ZHOU Lijiang

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Estimation of Sediment Silting in River Channeldue to Developing Rare Earth Mine in Red Earth Region

- Estimation of Sediment Silting in River Channeldue to Developing Rare Earth Mine in Red Earth Region
- Bulletin of Soiland Water Conservation Vol. 24, Issue 6, Pages: 53-58(2005)
- 作者机构：
  
  1. 西安建筑科技大学, 环境与市政工程学院, 教育部西北水资源与环境生态重点实验室,陕西,西安,710055
  2. 西南师范大学资源环境学院生命科学学院, 重庆北,400715
  3. 四川省林业勘查设计研究院,四川,成都,610081
- 作者简介：
- 基金信息：
- DOI：
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- Published：2005
- 稿件说明：
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SHI Hui, TIAN Feng, HUANG Lin, et al. Estimation of Sediment Silting in River Channeldue to Developing Rare Earth Mine in Red Earth Region[J]. Bulletin of Soiland Water Conservation, 2005, 24(6): 53-58.
DOI：

SHI Hui, TIAN Feng, HUANG Lin, et al. Estimation of Sediment Silting in River Channeldue to Developing Rare Earth Mine in Red Earth Region[J]. Bulletin of Soiland Water Conservation, 2005, 24(6): 53-58. DOI：

摘要

不合理的人为活动是侵蚀产沙的主要原因之一。在江西省信丰县崇墩沟小流域内由于稀土矿产的无序开发，导致河流泥沙严重淤积。通过实测河流淤积泥沙断面，计算出在7500m长的河道共淤积泥沙30193t，考虑到输移比，整个流域内土壤流失量可达3500t/km

，平均侵蚀模数也高达1150t/(km

.a)以上，属于中等强度的土壤侵蚀。调查结果发现，河流中淤积的泥沙主要来源于稀土矿开发的尾矿流失；土壤流失量高到99730t/km

，年平均侵蚀模数为34000t/(km

.a)以上，属于极强度的水土流失。治理水土流失，须加强对稀土矿开发的管理，防止形成新的水土流失；将已废弃的稀土尾矿作为治理的重中之重，可有效地降低流域内土壤侵蚀的强度。

Abstract

the unreasonable human activity is one of the key factors for soil erosion and sedimentyield. Irrational developing ofrare earth m ine ongdonggou watershed

Xinfeng County

induced to serious sediment silting in the river channel

and thetotal silting sediment was 30193 tiven the 7500m river channel estimated by measuring the siltiveng sectiveon. Based on the sediment delivery ratio

soil loss in thewhole tershed was 3500t/km2

and soilerosive radius was more than 1150 t/(km2 Erosion degree in the watershed was of middle erosion density. Soilloss from the tailings ofrare earth mine was the most serious sources for sedimentiven river

and the loss was 99 730t/km2 with annual erosion amount greater than 34000t/(km3a) as the severest loss type. Among all the soil and water loss controlling easurements

managementofrare earth mine development should be intensified and con-trolling abandoned mine tailings should be as a key aspect.

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