天津中东部平原区土壤盐分空间分布特征

贾娇; 何萍; 徐杰; 任颖; 侯利萍

doi:10.12153/j.issn.1674-991X.20200221

天津中东部平原区土壤盐分空间分布特征

doi: 10.12153/j.issn.1674-991X.20200221

贾娇^1,2,,
何萍^1,2,*, ,,
徐杰^1,2,
任颖^1,2,
侯利萍^1,2

1.
环境基准与风险评估国家重点实验室,中国环境科学研究院
2.
国家环境保护区域生态过程与功能评估重点实验室,中国环境科学研究院

详细信息

作者简介:
贾娇(1992—),女,硕士研究生,研究方向为湿地生态学, jiajiao0121@163.com

通讯作者:
何萍 E-mail: heping@craes.org.cn

中图分类号: X53
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出版历程
- 收稿日期: 2020-09-14
- 刊出日期: 2021-07-20

Spatial distribution characteristics of soil salinity in the middle and eastern plain of Tianjin

JIA Jiao^{1,2
,},
HE Ping^{1,2,*
, ,},
XU Jie^1,2,
REN Ying^1,2,
HOU Liping^1,2

1.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences
2.
State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment, Chinese Research Academy of Environmental Sciences

More Information

Corresponding author: HE Ping E-mail: heping@craes.org.cn

摘要

摘要: 土壤盐渍化是滨海地区生态保护修复的重要影响因素。为了解天津平原地区土壤盐渍化程度,沿永定新河、海河干流和独流减河3条入海河流海陆方向开展堤外土壤盐分采样调查,结合地统计学和GIS技术,分析海陆方向土壤盐分的空间梯度和变异特征,以期为天津生态保护修复和陆海统筹提供科学依据。结果表明:土壤水溶性盐含量和碱化度整体呈自东南向西北递减的趋势;重度及以上盐渍化土主要分布在海岸线向陆地纵深15 km的滨海新区,其中盐土、重度碱化土主要分布在大港距海10 km内、塘沽与汉沽距海5 km内;中度盐渍化土主要分布在独流减河沿线距海15~60 km内;轻度盐渍化土主要分布在海河干流沿线距海10~60 km内。土壤阳离子以Na⁺为主;从海岸线向陆域方向,土壤阴离子从以Cl^-、 $SO 4 2 -$ 为主逐步过渡到以 $SO 4 2 -$ 、 $CO 3 2 -$ + $HCO 3 -$ 为主。独流减河一线盐渍土类型以硫酸盐-氯化物和氯化物-硫酸盐为主;海河干流中部平原区盐渍土类型以硫酸盐-苏打为主;永定新河一线盐渍土类型以硫酸盐-氯化物和苏打-硫酸盐为主。
- 天津 /
- 土壤 /
- 盐渍土 /
- 空间分布 /
- 半方差函数 /
- 普通克里格
Abstract: Soil salinization is an important influence factor in the ecological protection and restoration of coastal areas. In order to understand soil salinization degree in Tianjin plain, soil samples outside the embankment were collected and investigated along three rivers from sea to land, including the Yongding New River, the Haihe River and the Duliujian River. The spatial gradient and variability of soil salinity in the sea-land direction were analyzed, by combining geostatistics with geographic information system (GIS) technology. The study potentially provided scientific basis for ecological protection and restoration, and land and sea coordination in Tianjin. The results showed that soil water-soluble salt content and soil alkalization appeared to be decreased gradually from the southeast to the northwest. Severe and above salinized soil was mainly distributed in Binhai New Area with 15 km from the coastline to the land. Solonchak and severe alkaline soil were primarily distributed in Dagang within 10 km to the sea, Tanggu and Hangu within 5 km from the coastline. Moderate saline soil was mainly distributed along the Duliujian River within 15-60 km from the coastline. Slight saline soil was mainly distributed along the mainstream of the Haihe River within 10-60 km from the coastline. The predominant cation in soil was mostly Na⁺, while the predominant anions transferred from Cl^- and $SO 4 2 -$ to $SO 4 2 -$ and $CO 3 2 -$ + $HCO 3 -$ in the landward direction. Sulfate-chloride and chloride-sulfate soils were the primary saline soil types along the Duliujian River, sulfate-soda soil was the primary saline soil type along the central plain of the Haihe River, and sulfate-chloride and soda-sulfate soils were the primary saline soil types along the Yongding New River.
- Tianjin /
- soil /
- saline soil /
- spatial distribution /
- semi-variance /
- ordinary Kriging

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