不同类型生物滞留设施土壤介质层氮磷分布特征分析

袁绍春; 杨孟颖; 陈茜; 杨清伟; 吕波

doi:10.13205/j.hjgc.202405017

不同类型生物滞留设施土壤介质层氮磷分布特征分析

doi: 10.13205/j.hjgc.202405017

袁绍春^1,2, ,,
杨孟颖^1,3,
陈茜³,
杨清伟¹,
吕波^2,4

1. 重庆交通大学水利水运工程教育部重点实验室, 重庆 400074;
2. 重庆市海绵城市建设工程技术研究中心, 重庆 400020;
3. 重庆交通大学环境水利工程重庆市工程实验室, 重庆 400074;
4. 重庆市科学技术研究院, 重庆 401123

基金项目:

重庆市自然科学基金(cstc2020jcyj-msxmX1000)

重庆市建设科技计划项目(城科字2020第5-7)

详细信息

作者简介:
袁绍春(1984-),男,副教授,主要从事城市雨洪管理、废水处理及资源化技术研究。yuansc@cqjtu.edu.cn

通讯作者:
袁绍春(1984-),男,副教授,主要从事城市雨洪管理、废水处理及资源化技术研究。yuansc@cqjtu.edu.cn

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出版历程
- 收稿日期: 2023-02-01
- 网络出版日期: 2024-07-11

DISTRIBUTION CHARACTERISTICS OF NITROGEN AND PHOSPHORUS IN SOIL MEDIUM LAYER IN DIFFERENT TYPES OF BIORETENTION FACILITIES

YUAN Shaochun^{1,2
, ,},
YANG Mengying^1,3,
CHEN Xi³,
YANG Qingwei¹,
LV Bo^2,4

1. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, China;
2. Engineering Research Center for Sponge City Construction of Chongqing, Chongqing 400020, China;
3. Chongqing Engineering Laboratory of Environmental Hydraulic Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
4. Chongqing Academy of Science and Technology, Chongqing 401123, China

摘要

摘要: 为探明实际工程中生物滞留设施的N、P累积状况,以重庆市悦来海绵城市试点的典型生物滞留设施为研究对象,考察土壤介质不同深度TN、NH₄⁺-N、NO₃^--N、TP、有效磷(AP)含量,研究介质层氮磷分布规律。结果表明:生态树池、雨水花园、生物滞留带、高位花坛设施中TN、TP在表层土壤(0~10 cm)中的含量最高,并随着深度增加呈逐渐降低趋势,其中雨水花园表层土壤TN含量最高,达到885 mg/kg;NH₄⁺-N主要分布于中层土壤,约占总含量的28%;不同土层NO₃^--N含量差异较小,为0.31~1.25 mg/kg。含水率(WC)会影响土壤介质NO₃^--N和AP的分布,其中生态树池中上层土壤NO₃^--N含量与含水率(WC)在0.05水平上呈显著负相关,较高的WC有利于减少土壤NO₃^--N累积量;pH对土壤介质NO₃^--N、TN、TP、AP的分布均有一定影响,其中,NO₃^--N、AP含量与pH呈负相关,较高的pH有利于减少土壤NO₃^--N、AP累积量。
- 氮、磷浓度 /
- 生物滞留设施 /
- 分布特征 /
- 土壤介质 /
- 含水率
Abstract: To explore the accumulation of nitrogen and phosphorus in bioretention facilities in practical projects, four types of typical bioretention facilities in the Yuelai Sponge City in Chongqing were taken as research objects to investigate the contents of TN, NH₄⁺-N, NO₃^--N,TP and available phosphorus (AP) at different depths of soil media, and study the distribution of nitrogen and phosphorus in the medium layer. The results showed that the contents of TN and TP in the surface soil (0 to 10 cm) of ecological tree pond, rain garden, biological retention zone and biological parterre were the highest. In particular, the contents of TN in the surface soil of rain gardens were the highest, reaching 885 mg/kg. NH₄⁺-N was mainly distributed in the middle layer of soil, accounting for about 28% of the total content. NO₃^--N content in different soil layers had little difference and fluctuated in the range of 0.31~1.25 mg/kg. Water content (WC) can affect the distribution of NO₃^--N and AP in soil, and NO₃^--N content in the middle and upper soil of ecological tree pool was significantly negatively correlated with WC at the level of 0.05, and higher water content can weaken the accumulation of NO₃^--N. pH effected the distribution of NO₃^--N, TP, TN and AP in soil, and the contents of AP and NO₃^--N in soil were negatively correlated with pH. Higher pH can reduce the accumulation of NO₃^--N and AP in soil.
- nitrogen and phosphorus concentrations /
- bioretention facility /
- distribution characteristics /
- soil medium /
- water content

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