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Development of portable water quality monitoring system using multiwavelength spread spectrum

利用多波长扩频的便携式水质监测系统的开发

基本信息

批准号：
09558068
负责人：
SOMIYA Isao
金额：
$ 2.11万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

In this study, in order to grasp water quality change on a site which changes every moment, portable type water quality measurement equipment by multiwavelength spread spectrum which enables direct measurement of un-filtration, non-chemical feed sample was developed, and many water quality indices of SS, Chl. a, NOx-N, TOC, DOC was measured using scattered light intensity and fluorescence intensity To begin with, 120 water samples were collected in 6 sites in the Kyoto city by May。ォNovember, 1999, and the relationship between optical intensity and each water quality indices concentration was examined. Then, we selected 3 wavelength from the 1 wavelength for each water quality index detection. The concentration estimated formulas which obtained the water quality concentration from optical intensity using this wavelength were obtained by the multiple regression analysis. The verification was carried out using Lake Biwa water (each month water depth 0.5m, 30m, total of 29 samples) in Janu … More ary, 99, April, July, October in order to examine the generality of the these concentration estimated formulas. As the result, in SS, Chl. a, NOx-N, there were the generality in the concentration estimated formulas. The error was greatly improved by deciding the coefficient in the object waters properly, though the error was greatly seen in TOC and DOC, because the dissolved organic substance kind is different between waters. 24 hours fixed point coetaneous monitoring in dam lake and river was carried out in order to examine the applicability to actual water area using this equipment. It was possible to catch the change of water quality in top and bottom (0m water depth, 20m) of the thermocline in the dam lake. However, further improvement was needed for the practical application of dew condensation of the cell from a peep of dawn, etc. In the stationary measurement in the river, the measurement which was stabilized for 24 hours was possible by establishment of a constant temperature oven at front stage for cell dew condensation prevention. And, this equipment had followed large change of water quality sharp, and it was proven to be applicable to the actual water area. Less

本研究中，为了掌握随时变化的现场水质变化，开发了便携式多波长扩频水质测量设备，该设备能够直接测量未经过滤的非化学饲料样品，并测量了SS、Chl. a、NOx-N、TOC、DOC用散射光强度和荧光强度测定。开始，到5月，在京都市的6个地点收集了120个水样。1999年11月11日，在此基础上，研究了光强度与各水质指标浓度之间的关系。然后从1个波长中选取3个波长进行各水质指标的检测。通过多元回归分析，得到了利用该波长由光强估算水质浓度的浓度估算公式。验证于2010年1月使用琵琶湖水（每个月水深0.5m，30 m，共29个样本）进行 ...更多信息 1999年4月、7月、10月的浓度估算公式，以检验这些浓度估算公式的通用性。结果表明，在SS、Chl. a、NOx-N的浓度估算公式具有普遍性。虽然TOC和DOC由于沃茨中溶解性有机物的种类不同，误差较大，但适当确定目标沃茨中的系数，可以大大改善误差。为检验该仪器在实际水域的适用性，对坝湖、河流进行了24小时定点同期监测。坝湖温跃层顶部和底部（0 m水深、20 m水深）的水质变化是可以捕捉到的。然而，需要进一步改进的实际应用中的细胞从黎明等露凝结。在河流中的固定测量，稳定的24小时的测量是可能的，通过建立一个恒温箱在前面的阶段，为细胞结露的预防。该设备对水质变化的跟踪能力较强，适用于实际水域。少