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得州南部高原地区的干盐湖位于地下水活跃补给 Ogalalla 含水层的部位,构成了市政和农业废物管理系统的一部分。关于干盐湖抑制牛奶厂污水的有效性已作了一些研究,分别在干盐湖的环形区和干湿交替区布置了4个取样孔,并且从这几个孔中采集了表面和下部的土样。在此区内牛奶厂的地表排泄物已进入了干盐湖。随后对这些钻孔取样作了包括硝酸盐氮、铵氮、pH 值、电导率和土壤结构的物理和化学分析。对两个钻孔剖面上的氯化物分布与硝酸盐进行了对比。研究结果表明,在干盐湖的干湿交替带重粘土底层上部2m 范围内,营养组分含量值增高,但在此深度以下就并非如此了。硝酸盐和氯化物分布情况的比较表明,脱硝化作用去除了干盐湖这一地带的大部分硝酸根,这也说明,一旦到达干盐湖中心区,硝酸盐便能经历足够长时间的被脱硝化作用。然而,在干盐湖的环形区内发现了氯化物的运移。此外,氯化物在干盐湖中心之下的分布特征,让人还担心存在来自干盐湖的氯化物的运移问题。
The dry salt lake in the southern Plains of Texas is located on the active aquifer Ogalalla groundwater and forms part of the municipal and agricultural waste management system. Some researches have been done on the effectiveness of dry salt lake in inhibiting milk wastewater. Four sampling holes are arranged in the annular area of the dry salt lake and alternate wetting and drying areas, and the surface and lower soil samples are collected from these holes . The surface excrement of the milk plant in this area has entered dry salt lake. These borehole samples were then subjected to physical and chemical analyzes including nitrate nitrogen, ammonium nitrogen, pH, conductivity, and soil structure. The chloride distribution on the two boreholes is compared with nitrate. The results show that the content of nutrients in the upper 2 m of dry-wet alternate heavy clay in dry salt lake is higher than that in the dry salt wetlands. However, it is not the case below this depth. A comparison of nitrate and chloride distribution shows that denitrification removes most of the nitrate from the dry salt lake, which also shows that nitrate reaches denitrification for a time sufficient to reach the central area of dry lake effect. However, chloride transport was found in the annulus of the dry lake. In addition, the distribution of chloride below the center of the dry lake is worrying about the migration of chloride from the dry salt lake.