为探讨河岸带生态修复措施对河流水质的直接影响,以永定河已修复的门城湖—莲石湖区段为研究对象,于2013年7—10月沿西岸选取8个采样点,测定溶解氧(DO)、氨氮(NH4+—N)、硝氮(NO3-—N)和总磷(TP)的质量浓度.结果表明,河流DO浓度和各营养物质浓度均有明显的季节变化.大部分采样点的DO、NH4+—N和TP浓度未达到地表水IV类水体标准.水生植物较多的河岸带处,河流NH4+—N浓度较低.在生长旺季,长势好的水生植物越多,河流DO和NO3-—N浓度越高,TP浓度越低;在生长末期,枯落物较多的河岸带处,河流DO浓度较低,TP浓度较高.凸岸处的河流DO和NO3-—N浓度较高,而NH4+—N浓度较低.因此,改变护岸类型、水生植物的多度及河岸的弯曲程度等河岸带结构特征可引起河流水质的变化.
The ecological effects of restoration of flood lands and buffers from Mencheng lake to Lianshi lake along Yongding river in Beijing were discussed. From July to October in 2013, water samples were periodically collected at the 8 selected sites along the west bank, and the concentrations of dissolved oxygen(DO), nitrate nitrogen(NO3-—N ), ammonia nitrogen (NH4+—N), and total phosphorus(TP) were measured and analyzed. The results showed that there were obvious seasonal variations in the concentrations of these nutrients and DO in Yongding river. For most of the sites, water quality could not meet the requirements for the surface water standard class IV. The NH4+—N concentration was low where the amount of hydrophytes was relatively large. During the growing season, higher coverage of hydrophytes led to higher DO and NO3-—N concentrations and lower TP concentration, while at the end of the growing period, much small contributions to the higher TP and lower DO concentrations. The convex river bank could enhance the DO and NO3-—N concentrations and reduce the NH4+—N concentration. In short, changes in the structure characteristics of riparian zone such as bank material, abundance of hydrophytes, and curvilinearity of banks had great effects on water quality in Yongding river.
[1] Grgory S V, Swanson F J, Mckee W A, et al. An ecosystem perspective of riparian zones[J]. Bioscience,1991,41(8):540-551.
[2] Naiman R J. Watershed management:balancing sustainability and environmental change[M]. New York :SpringerVerlag, USA, 1992:542.
[3] 邓红兵.河岸植被缓冲带与河岸带管理[J].应用生态学报,2001,12(6):951-954.
[4] Forman R,Godron M.景观生态学[M].肖笃宁,等译.北京:科学出版社,1990:20-75.
[5] 陈吉泉.河岸植被特征以及其生态系统和景观中的作用[J].应用生态学报,1996,7(4):439-448.
[6] 黄玲玲,张鹏,张旭东.河岸带对氮磷的截留转化作用 [C]//中国环境科学学会. 第二届生态补偿机制建设与政策设计高级研讨会论文集.2008:5.
[7] 夏继红,严忠民.生态河岸带的研究进展与发展趋势[J].河南大学学报:自然科学版,2004,32(3):252-255.
[8] 范小华,谢德体,魏朝富.河岸带生态系统管理模型研究进展[J].中国农学通报,2006,22(1):277-282.
[9] 夏继红,严忠民.生态河岸带的概念及功能[J].水利水电技术,2006,37(5):14-18.
[10] 夏继红.生态河岸带综合评价理论与应用研究 [D].南京:河海大学,2005.
[11] 夏继红,胡玲.生态河岸带功能区划的定性与定量研究[J].水利学报,2007(S1):542-546.
[12] Volpi J A. A landscape ecology approach to functionality-based riparian classification and land-use planning [D].Kent State University,2003.
[13] Lee P, Smyth C, Boutin S. Quantitative review of riparian buffer width guidelines from Canada and United States[J]. Environmental Management,2004,70:165-180.
[14] Weller D E,Jordan T E, Correll D L. Heuristic models for material discharge from landscapes with riparian buffers[J]. Ecological Applications, 1998,8(4):1 156-1 169.
[15] Trimble G R, Sartz R S. How far from a stream should a logging road be located?[J].Forest,1957,55:339-341.
[16] Polyakov V, Fares A, Ryder M H. Precision riparian buffers for the control of nonpoint source pollutant loading into surface water: a review[J]. Environmental Reviews,2005,13:129-144.
[17] 左俊杰,蔡永立,罗坤,等.上海地区河岸带结构:类型、分布及改进[J].水资源保护,2009,25(6):24-28.
[18] 张广分,齐实,肖红霞,等.北京地区滨水缓冲带的现状研究[J].湖南农业科学:下半月,2011(8):34-36.
[19] 何亚平,费世民,陈秀明,等.雅砻江上游地区河岸带类型研究[J].四川林业科技,2008,29(5):1-5.
[20] 李婉,张娜,吴芳芳.北京转河河岸带生态修复对河流水质的影响[J]. 环境科学,2011,32(1):80-87.
[21] 韩玉玲,岳春雷,叶碎高.河道生态建设:植物措施应用技术[M].北京:中国水利水电出版社,2009:149-155.
[22] 中国21世纪议程管理中心,北京大学环境工程研究所.城市河流生态修复手册[M].北京:社会科学文献出版社,2008:256-258.
[23] 朱文星,邓卓智.简述永定河城市段的生态修复[J].水利科技与经济,2012,18(2):19-21, 37.
[24] 梁淑娟,樊华,王利军,等.永定河生态护岸模式的适宜性观测研究[J].水土保持研究,2012,19(4):153-158.
[25] 鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社, 2002:130-133.
[26] 任玉芬,张心昱,王效科,等.北京城市地表河流硝酸盐氮来源的氮氧同位素示踪研究[J].环境工程学报,2013,7(5):1 636-1 640.
[27] 种云霄,胡洪营,钱易.大型水生植物在水污染治理中的应用研究进展[J].环境污染治理技术与设备,2002,4(2):36-40.
