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白沙河流域地下水及营养盐向海湾输送 被引量:6

Estimation of Groundwater and Nutrients Flux from Baisha Watershed into Jiaozhou Bay
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摘要 根据白沙河流域自然地理和水文地质特征 ,在大量室内外试验的基础上分别运用水量均衡法、断面法和咸淡水界面法 ,估算了白沙河流域地下水向海湾的输送水量及营养盐输送量。 3种方法估算的结果表明 ,白沙河流域地下水向海湾输送量较大且受降雨影响显著 ,丰水年 (1998年 )地下水入海量高达 2 .2× 10 6m3 ,是枯水年 (1992年 )入海量的 2倍。另外 ,农田灌溉及大气降雨淋滤土壤中所施肥料使该区地下水中营养盐浓度 (尤其是硝酸盐氮浓度 )严重超过了饮用水水质标准 ,每年有 (4~ 11)× 10 6mol硝酸盐氮随地下水入海 ,相比之下 ,可溶性二氧化硅含量稳定 ,氨氮、亚硝酸盐氮、总磷含量较低 ,排海量较少。 The groundwater and nutrients discharge from the Baisha Watershed is estimated by the water quantity equilibrium method, the section method and the salt-fresh water interface method based on the physiogeographic and hydrogeologic conditions and a great many outdoor and indoor experiments. The results from these methods indicate that the quantity of Submarine Groundwater Discharge (SGD) from the Baisha Watershed is huge, and is significantly influenced by precipitation.The SGD was 2.2×106m3 in a wet year (1998), which was two times as much as that in a drought year(1992). The concentration of nitrate nitrogen in the groundwater of this area cannot meet the drinking water standards, which is due to the lixiviation of fertilizers through irrigation and precipitation. The quantity of nitrate nitrogen flowing into Jiao Zhou Bay is (4~11)×106mol annually. The concentration of soluble silicon dioxide is steady. The concentrations of amino nitrogen, nitrite nitrogen and phosphate are low and their quantities discharged into the Bay are small.
出处 《中国海洋大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第1期67-72,共6页 Periodical of Ocean University of China
基金 国家自然科学基金重点项目 (40 0 360 1 0 )资助
关键词 白沙河流域 地下水 营养盐 入海量 Baisha watershed groundwater nutrients discharge into sea
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