Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (1): 195-201.doi: 10.13278/j.cnki.jjuese.201601203

Previous Articles     Next Articles

Maintenance Mechanism of Freshwater Lens in Vadose Zone on Coastal Saline Areas

Zhao Lin, Mo Huiting, Zheng Yi   

  1. School of Environment Science and Technology, Tianjin University, Tianjin 300072, China
  • Received:2015-05-03 Online:2016-01-26 Published:2016-01-26
  • Supported by:

    Supported by Key Projects in the National Science & Technology Pillar Program During the Twelfth Five-Year Plan Period (2012BAC07B02)

Abstract:

Rainfall recharge is an important source for the shallow groundwater of coastal saline areas. The depth of saline groundwater level is shallow. In the process of precipitation infiltration into the soil at different permeability in vadose zones, freshwater lens will be formed above phreatic surface at a certain time. The freshwater lens can partially stop the soil and plants from being damaged by the underground salt water, and supply plants with water to some extent. The authors made an indoor physical simulator for this study. By controlling soil structure, the formation and regression process of freshwater lens under precipitation infiltration was simulated; and the maintenance of freshwater lens in different type of soil was discussed. Also, by using suction pipe to simulate the plant roots water absorption, the changes of freshwater lens were observed under different water absorption conditions. The results showed that the freshwater lens maintained the best in the soil structure where the upper layer was medium sand and the bottom layer was silty clay. The freshwater lens reached maximum thickness at about 15 cm in 1500 min and maintained about 7500 min. The stable freshwater lens formed in the double layers soil could separate the underground salt water, and provide 243.5 mL freshwater for the plants above.

Key words: coastal saline area, shallow groundwater, vadose zone, freshwater lens, laboratory simulation experiment

CLC Number: 

  • P641.69

[1] 王洪义, 王智慧, 杨凤军, 等. 浅密式暗管排盐技术改良苏打盐碱地效应研究[J]. 水土保持研究, 2013, 20(3):269-272. Wang Hongyi, Wang Zhihui, Yang Fengjun, et al. Research for the Effect of Shallow-Tight Type Subsurface Drain Pipes on Improving Soda Saline-Alkaline Land[J]. Research of Soil and Water Conservation, 2013, 20(3):269-272.

[2] 于淑会, 刘金铜, 李志祥, 等. 暗管排水排盐改良盐碱地机理与农田生态系统响应研究进展[J]. 中国生态农业学报, 2012, 20(12):1664-1672. Yu Shuhui, Liu Jintong, Li Zhixiang, et al. Mechanism of Saline-Alkali Lands Improvement of Subsurface Pipe Drainage Systems and Agro-Ecosystem Response[J]. Chinese Journal of Eco-Agriculture, 2012, 20(12):1664-1672.

[3] Shao Xiaohou, Chang Tingting, Cai Fei, et al. Effects of Subsurface Drainage Design on Soil Desalination in Coastal Resort of China[J]. Science and Technology, 2012, 10(2):935-938.

[4] 孙宁宁. 天津市盐碱地区的园林绿化措施探讨[J]. 黑龙江农业科学, 2011(3):87-89. Sun Ningning. Discussion on Landscaping Measures in Tianjin Saline Areas[J]. Heilongjiang Agricultural Sciences, 2011(3):87-89.

[5] 高彦花, 张华新, 杨秀艳, 等. 耐盐碱植物对滨海盐碱地的改良效果[J]. 东北林业大学学报, 2011, 39(8):43-46. Gao Yanhua, Zhang Huaxin, Yang Xiuyan, et al. Ameliorative Effect of Saline-Alkali Tolerant Plants in Coastal Saline-Alkali Land[J]. Journal of Northeast Forestry University, 2011, 39(8):43-46.

[6] 刘寅. 天津滨海耐盐植物筛选及植物耐盐性评价指标研究[D]. 北京:北京林业大学, 2011. Liu Yin. Studies on Salt-Tolerance Plants Selection in Tianjin Coastal Areas and Salt-Toleration Evaluation Indices[D]. Beijing:Beijing Forestry University, 2011.

[7] 张余良, 王正祥, 廉晓娟, 等. 滨海盐土灌水脱盐动态的土壤质地和水质差异性研究[J]. 农业环境科学学报, 2010, 29(3):515-520. Zhang Yuliang, Wang Zhengxiang, Lian Xiaojuan, et al. Desalting Dynamic State Diversity of Coastal Solonchak Soils Differed in Soil Texture and Irrigated with Varied Water Quality[J]. Journal of Agro-Environment Science, 2010, 29(3):515-520.

[8] 朱庭芸, 夏兆萱. 滨海咸水区淡水透镜体的利用[J]. 北方水稻, 1982, 2(6):48-60. Zhu Tingyun, Xia Zhaoxuan. Use of Freshwater Lens in Coastal Saline Region[J]. The North Rice, 1982, 2(6):48-60.

[9] Kolja R, Delwyn S O, Aly I E. Changes of Freshwater-Lens Thickness in Basaltic Island Aquifers Overlain by Thick Coastal Sediments[J]. Hydrogeology Journal, 2010, 18(6):1425-1436.

[10] Hocking G C, Chen S A, Forbes L K. Withdrawal from the Lens of Freshwater in a Tropical Island:The Two Interface Case[J]. Computers and Fluids, 2011, 50(1):175-180.

[11] 霍思远, 靳孟贵, 梁杏. 包气带弱渗透性黏土透镜体对降雨入渗补给影响的数值模拟[J]. 吉林大学学报(地球科学版), 2013, 43(5):1579-1587. Huo Siyuan, Jin Menggui, Liang Xing. Impacts of Lower Meability Clay Lens in Vadose Zone onto Rainfall Infiltration and Groundwater Recharge Using Numerical Simulation of Variably Saturated Flow[J]. Journal of Jilin University(Earth Science Edition), 2013, 43(5):1579-1587.

[12] Fetter C W. Position of the Saline Water Interface Beneath Oceanic Islands[J]. Water Resources Research, 1972, 8(5):1307-1315.

[13] SL 237-1999土工试验规程[S]. 北京:中华人民共和国水利部, 1999. SL 237-1999 Specification of Soil Test[S]. Beijing:Ministry of Water Resources of the People's Republic of China, 1999.

[14] Toride N, Leij F J, Van Genuchten M T. The CXTFIT Code for Estimating Transport Parameters from Laboratory or Field Tracer Experiments[R]. Riverside:U S Salinity Laboratory, USDA, ARS, 1995.

[15] 肖长来, 梁秀娟, 王彪. 水文地质学[M]. 北京:清华大学出版社, 2010. Xiao Changlai, Liang Xiujuan, Wang Biao. Hydro-geology[M]. Beijing:Tsinghua University Press, 2010.

[16] 孙宇瑞. 土壤含水率和盐分对土壤电导率的影响[J]. 中国农业大学学报, 2005, 5(4):39-41. Sun Yurui. Experimental Survey for the Effects of Soil Water Content and Soil Salinity on Soil Electrical[J]. Journal of China Agricultural University, 2005, 5(4):39-41.

[17] Jocson J M U, Jenson J W, Contractor D N. Recharge and Aquifer Response:Northern Guam Lens Aquifer, Guam, Mariana Islands[J]. Journal of Hydrology, 2002, 260(1/2/3/4):231-254.

[1] Qiao Gang, Wang Wenke. Evaporation Intensity of Bare Soil in Northwest Arid Inland Basin [J]. Journal of Jilin University(Earth Science Edition), 2014, 44(4): 1327-1332.
[2] He Yujiang, Lin Wenjing, Wang Guiling. In-Situ Monitoring on the Soil Water-Heat Movement of Deep Vadose Zone by TDR100 System [J]. Journal of Jilin University(Earth Science Edition), 2013, 43(6): 1972-1979.
[3] Huo Siyuan,Jin Menggui,Liang Xing. Impacts of Low-Permeability Clay Lens in Vadose Zone onto Rainfall Infiltration and Groundwater Recharge Using Numerical Simulation of Variably Saturated Flow [J]. Journal of Jilin University(Earth Science Edition), 2013, 43(5): 1579-1587.
[4] CHENG Dong-hui, WANG Wen-ke, HOU Guang-cai, YANG Hong-bin, LI Ying, ZHANG Er-yong. Relationship Between Vegetation and Groundwater in Mu Us Desert [J]. J4, 2012, 42(1): 184-189.
[5] SHI Xu-fei, DONG Wei-hong, LI Man-zhou, ZHANG Yan. The Age of Shallow Groundwater in Henan Plain [J]. J4, 2012, 42(1): 190-197.
[6] DIAO Yong-sheng, WANG Bing, QU Zhi-hui, ZHENG Wei, JIA Xu, SUN Meng. Natural Attenuation of Diesel Pollution in Sand Layer of Vadose Zone [J]. J4, 2010, 40(2): 389-393.
[7] LAN Shuang-shuang, JIANG Ji-yi, WANG Bin. Evaluation of Groundwater Quality Based on Matter-Element and Extension Means [J]. J4, 2009, 39(4): 722-727.
[8] ZHOU Rui, ZHAO Yong-sheng, WU Qian-fang, LI Hong-shun,REN He-jun, QU Zhi-hui. The Organic Materials of Different Age Landfill Leachate Retarded by Vadose Zone [J]. J4, 2008, 38(6): 1032-1036.
[9] ZHEN Li, ZHOU Cong-zhi, SHU Long-cang, CAO Ying-jie,GENG Hai-tao. Laboratory Simulation Experiment of Evolution of Island Freshwater Lens [J]. J4, 2008, 38(1): 81-0085.
[10] LIU Fu-tian, SU Xiao-si, HOU Guang-cai,LIN Xue-yu, YI Shu-ping,DONG Wei-hong. Application of CFCS Methods in Dating Shallow Groundwater in the Ordos Cretaceous Groundwater Basin [J]. J4, 2007, 37(2): 298-302.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!