断层对垃圾填埋场地下水COD<sub>Mn</sub>迁移影响的模拟：以深圳市龙华能源生态园为例

裴洪军; 谢浩; 程天舜; 汪丙国

doi:10.19509/j.cnki.dzkq.tb20240731

断层对垃圾填埋场地下水COD_Mn迁移影响的模拟：以深圳市龙华能源生态园为例

doi: 10.19509/j.cnki.dzkq.tb20240731

1 .
深圳市水务规划设计院股份有限公司，广东深圳 518110
2 .
中国地质大学（武汉）环境学院，武汉 430078

基金项目: 国家自然科学基金项目（U1911205）

详细信息

作者简介:
裴洪军：E-mail：peihj@swpdi.com

通讯作者:
E-mail：chengts@swpdi.com

中图分类号: P641.2；X523
计量
- 文章访问数: 259
- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2024-11-28
- 录用日期: 2025-06-24
- 修回日期: 2025-06-04
- 网络出版日期: 2024-12-31

Simulation on fault effects on COD_Mn migration in groundwater at landfill site：A Case Study of Longhua Energy Ecological Park in Shenzhen City

1 .
Shenzhen Water Planning and Design Institute Co., Ltd., Shenzhen Guangdong 518110, China
2 .
School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan 430078, China

More Information

Author Bio:
E-mail：peihj@swpdi.com

Corresponding author: E-mail：chengts@swpdi.com

摘要

摘要:
断层作为地质构造的重要组成部分，通过改变地下水流动路径、渗透性分布和溶质运移机制，显著影响污染物在地下水系统中的扩散范围和速度，然而国内外针对断层对垃圾填埋场地下水污染迁移模拟的研究尚不多见。基于GMS软件构建了包含断层渗透性的地下水流和溶质运移模型，开展了不同工况及断层渗透性增强下垃圾填埋场特征污染物渗漏对地下水环境和输水隧洞的影响模拟。模拟结果表明：在正常工况下，由于厂区底部防渗措施，污染物扩散范围基本限于厂区内部，且污染物中心最高质量浓度小于0.5 mg/L；在非正常工况下，1号、2号和3号污染源渗漏情景下污染物分别在第800，4015，1095 d扩散运移至输水隧洞所在位置，3种渗漏情景下污染物垂向扩散范围逐渐增大，但在平面上扩散范围存在较小差异。在1号和3号污染源情景下F4断层渗透性增强对污染物运移存在较大环境风险，在2号污染源情景下F3断层渗透性增强对输水隧洞区域未产生更大的环境风险。研究结果可为研究区地下水污染防治和风险评价提供科学支撑。
- 地下水污染迁移 /
- 数值模拟 /
- 风险预测 /
- 断层 /
- 深圳
Abstract: <p>As an important component of geological structure, faults significantly affect the diffusion range and tansport rate of pollutants within the groundwater systems by changing the groundwater flow paths, permeability distribution and solute transport mechanism. However, few studies have simulated the effect of faults on groundwater pollution migration in landfill sites, either domestically or internationally. </p></sec><sec><title>Methods
A groundwater flow and solute transport model incorporating fault permeability was developed using GMS software.
Objective
The model simulated the impact of characteristic landfill pollutant seepage on the groundwater environment and a water delivery tunnel under various conditions, considering enhanced fault permeability.
Result
The simulation results show that: under normal operating conditions, due to the anti-seepage measures at the bottom of the plant, the polluant diffusion range is largely confiend within the plant site, and the maximum pollutants concentration at the center iremains below 0.5 mg/L. Under abnormal conditions (leakage scenarios), pollutants from leakage source No. 1, No. 2 and No. 3 reached the water delivery tunnel location at 800 days, 4015 days and 1095 days, respectively. The vertical diffusion range of pollutants progressively increased across the three leakage scenarios, whereas difference in the horizontal(area) diffusion range were minimal.
Conclusion
Enhanced permeability of the F4 fault poses a greater environmental risk to pollutant migration in Leakage Source Scenarios No. 1 and No. 3. In Leakage Source Scenario No. 2, however, the enhanced permeability of the F3 fault does not significantly increase environmental risk levels in the tunnel area. To safeguard the local soil and water environment, anti-seepage reinforcement of potentially affected tunnel areas is necessary. The findings of this research provide scientific support for groundwater pollution prevention and risk assessment in the study area."
- groundwater pollution migration /
- numerical simulation /
- risk prediction /
- fault /
- Shenzhen City

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图 1 研究区地理位置图

Figure 1. Location map of the study area

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图 2 研究区水文地质略图

Q. 第四系；T₃x. 上三叠统小坪组；ηγ⁵K₁. 早白垩世侵入坪田凸单元侵入岩

Figure 2. Hydrogeological sketch of the study area

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图 3 位于强风化层的模型第4层（a）与位于中风化层的模型第7层（b）渗透系数分区

Figure 3. Zoning map of permeability coefficient of model Layer 4 located in strong regolith (a) and model Layer 7 located in medium regolith (b)

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图 4 地下水位模拟值与实测值散点图

Figure 4. Scatterplot of simulated and measured values of groundwater table

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图 5 输水隧洞所在层位的地下水等水位线图

Figure 5. Iso-level map of groundwater at the horizon where the water delivery tunnel is located

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图 6 正常工况下污染物运移30，50，100 a后在第2层的污染羽COD_Mn分布

Figure 6. COD_Mnpollution plume distribution at Layer 2 after 30 years, 50 years and 100 years of pollutant migration under normal conditions

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图 7 1号污染源区第800 d在第2层、第4层、第6层的平面污染羽和垂向污染羽COD_Mn分布

Figure 7. Simulated concentration distribution of COD_Mn in the plane pollution plume at layer 2, 4, and 6 and in the vertical pollution plume of No. 1 pollution source area on the 800th day

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图 8 2号污染源区第4015 d在第2层、第4层、第6层的平面污染羽和垂向污染羽COD_Mn分布（COD_Mn. mg/L）

Figure 8. Simulated concentration distribution of COD_Mn in the plane pollution plume at Layer 2, 4, and 6 and in the vertical pollution plume of No. 2 pollution source area on the 4015th day

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图 9 3号污染源区第1095 d在第2层、第4层、第6层的平面污染羽和垂向污染羽COD_Mn分布（COD_Mn. mg/L）

Figure 9. Simulated concentration distribution of COD_Mn in the plane pollution plume at Layer 2, 4, and 6 and in the vertical pollution plume of No. 3 pollution source area on the 1095th day

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图 10 1号(a₁～f₁)、2号(a₂～f₂)和3号(a₃～f₃)污染源情景下第450 d第2～7层的平面污染羽COD_Mn分布（箭头表示断层倾向，COD_Mn. mg/L）

Figure 10. The simulated COD_Mn pollution plume distribution at layer 2 to 7 on the 450th day of the No. 1 pollution source scenario (arrow indicates fault tendency)

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表 1 模型参数及分区值

Table 1. Model parameters and partition values

分层	岩性	渗透系数/(m·d⁻¹)			给水度 S_y	贮水率 S_s/m⁻¹	纵向弥散度/m
分层	岩性	K_x	K_y	K_z	给水度 S_y	贮水率 S_s/m⁻¹	纵向弥散度/m
松散沉积层	填土	3.024	3.024	3.024	0.20	0.005	10
松散沉积层	砂质黏土	0.389	0.389	0.389	0.05	0.001	5
强风化层	花岗岩	0.299	0.173	0.146	0.08	0.0005	10
	片麻岩	1.495	0.864	0.731	0.05	0.0002	10
	粉砂岩	3.741	2.160	1.832	0.06	0.0005	10
	石英砂岩	0.209	0.121	0.102	0.05	0.0005	10
中风化层	花岗岩	0.081	0.029	0.022	0.05	0.0002	10
	片麻岩	0.162	0.059	0.045	0.02	0.0001	10
	粉砂岩	0.406	0.147	0.112	0.03	0.0001	10
	石英砂岩	0.054	0.020	0.015	0.03	0.0002	10
微风化层	花岗岩	0.010	0.016	0.003	0.005	0.0001	1
	片麻岩	0.009	0.015	0.003	0.002	0.0001	1
	粉砂岩	0.020	0.034	0.007	0.003	0.0001	1
	石英砂岩	0.009	0.015	0.003	0.003	0.0001	1
注：K_x，K_y，K_z分别为渗透系数张量主方向x，y，z的渗透系数

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表 2 1号污染源情景下第2、4、6层平面污染羽及垂向污染羽COD_Mn特征参数

Table 2. COD_Mncharacteristic parameters of plane pollution plume at layer 2, 4, and 6 and the vertical pollution plume of No. 1 pollution source scenario

时间/d	平面污染羽			垂向污染羽
时间/d	第2层最大质量浓度/(mg·L⁻¹)	第4层最大质量浓度/(mg·L⁻¹)	第6层最大质量浓度/(mg·L⁻¹)	最大质量浓度/(mg·L⁻¹)	最大扩散距离/m
200	347.69	21.80	0	19.00	31.80
400	263.44	46.20	0	40.00	59.60
600	163.88	59.30	7.90	52.04	71.40
800	109.44	63.60	14.70	54.15	77.30

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表 3 2号污染源情景下第2、4、6层平面污染羽及垂向污染羽COD_Mn特征参数

Table 3. COD_Mn characteristic parameters of plane pollution plume at Layer 2, 4, and 6 and the vertical pollution plume of No. 2 pollution source scenario

时间/d	平面污染羽			垂向污染羽
时间/d	第2层最大质量浓度/(mg·L⁻¹)	第4层最大质量浓度/(mg·L⁻¹)	第6层最大质量浓度/(mg·L⁻¹)	最大质量浓度/(mg·L⁻¹)	最大扩散距离/m
20	417.30	14.80	0	0	0
40	271.96	36.30	0	0	0
60	183.71	51.20	0	0	0
80	129.35	59.30	5.20	0	0
1050	88.16	63.00	10.80	0	0
1250	67.45	62.90	14.70	0	0
1825	40.72	57.90	24.00	3.63	18.10
2920	21.23	41.60	32.00	7.28	50.50
4015	12.87	29.70	31.20	10.08	64.20

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表 4 3号污染源情景下第2，4，6层平面污染羽及垂向污染羽COD_Mn特征参数

Table 4. COD_Mncharacteristic parameters of plane pollution plume at Layer 2, 4, and 6 and the vertical pollution plume of No. 3 pollution source scenario

时间/d	平面污染羽			垂向污染羽
时间/d	第2层最大浓度/(mg·L⁻¹)	第4层最大浓度/(mg·L⁻¹)	第6层最大浓度/(mg·L⁻¹)	最大质量浓度/(mg·L⁻¹)	最大扩散距离/m
200	373.21	9.80	0	0	0
400	220.03	23.90	0	0	0
600	152.24	33.40	5.60	8.41	52.83
800	114.38	39.90	10.10	14.70	80.06
1015	81.48	43.20	13.90	21.12	110.48

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