茶園小流域からの窒素，リン，CODの排出負荷量の推定
茶園小流域からの窒素，リン，CODの排出負荷量の推定
复制标题
小型茶园盆地氮、磷和 COD 排放负荷估算
DOI：
10.2965/jswe.25.565
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
森 也寸志
中科院分区：
文献类型：
--
作者：
育郎 武田;孝男 國松;康孝 木原;森 也寸志
对茶园小流域进行了为期3年的水质调查，估算了茶园小流域总氮（T-N）、总磷（T-P）和化学需氧量（COD）的径流负荷。径流量采用水量平衡方程估算。hm-1，第2年为193 kg. hm-1，第3年为88.1 kg. hm-1，三年平均为114.1 kg. hm-1。氮负荷占施氮量的比例为17.1%，远低于以往的研究。在本研究中获得的低比率的主要原因是较低的氮浓度。T-P和COD的年径流负荷分别为0.68 kg·ha-1和59 kg·ha-1，两者均受降雨冲刷的影响。这一结果表明，在高地监测磷和COD以及氮的重要性。
An investigation on water quality was conducted in a small catchment of a tea field for three years, and runoff loads of total nitrogen (T-N), total phosphorus (T-P) and chemical oxygen demand (COD) were estimated. Runoff quantity was estimated using a water-balance equation. The annual runoff loads of T-N were estimated to be 61.0 kg·ha-1 for the first year, 193 kg·ha-1 for the second year, and 88.1 kg·ha-1 for the third year, and the average load for the three years was 114.1 kg·ha-1. The ratio of the nitrogen load to the amount of applied nitrogen fertilizer was 17.1%, being much lower than in previous studies. The main reason for the low ratio obtained in this study was the lower concentration of nitrogen. The annual runoff loads of T-P and COD were estimated to be 0.68 kg·ha-1 and 59 kg·ha-1, respectively, and both were affected by the flushing effect on rainy days. This result suggests the importance of monitoring of phosphorus and COD as well as nitrogen in upland fields.