Stambuk-Giljanović N
Institute of Public Health Split, Split, Croatia.
Environ Monit Assess. 2001 Oct;71(3):279-96. doi: 10.1023/a:1011806218107.
The article presents the results of chemical and microbiological measurements of the water quality in the Busko Blato reservoir, the largest in Europe, in the period 1989 to 1998. The aim was to observe possible changes in water quality during the past decade and its influence on the downstream section of the Cetina River and its numerous tributaries and reservoirs, where there are two large regional water supply systems. This reservoir was built in order to exploit the high hydroelectric potential of small streamflows in the karst fields of south-western Bosnia. It has strongly influenced the hydrologic conditions of the downstream section of the Cetina River. Busko Blato is a relatively shallow reservoir with the mean depth of 5 m. It covers an area of 57 km2. The water exchange in the reservoir is slow, occurring from one to several years. When the water inflow exceeds the hydroelectric plant demands the excess water is delivered by a reversible channel and pre-pumped into the Busko Blato reservoir. The total and carbonate water hardness in the reservoir is lower than in the Cetina River and in typical karst streamflows, since the water in this reservoir comes mainly from surface sources including numerous springs with high capacity oscillations, torrents and rainfall. Measurements, carried out during the past years, showed a significant increase in nitrate content as well as in the coli bacteria and a less significant increase in total phosphorus content. The water quality was evaluated as mezotrophic according to the total phosphorus content based on the Carlson index of trophic level, a lower quality than in the Peruca reservoir, upstream on the Cetina River. The latter contains a smaller phosphorus content and was classed between oligotrophic and mezotrophic. According to these data, employing the Vollenweider equation, the total phosphorus content in this water should not exceed the mean of 20 mg m(-3) P. The results indicate that the water in the Busko Blato reservoir did not deteriorate the water quality on the downstream section of the Cetina River.
本文介绍了1989年至1998年期间欧洲最大的布斯科布拉托水库水质的化学和微生物测量结果。目的是观察过去十年水质的可能变化及其对采蒂纳河下游段及其众多支流和水库的影响，那里有两个大型区域供水系统。该水库的建造是为了利用波斯尼亚西南部喀斯特地区小流量的高水电潜力。它对采蒂纳河下游段的水文条件产生了强烈影响。布斯科布拉托是一个相对较浅的水库，平均深度为5米。它占地面积57平方公里。水库中的水交换缓慢，需要一到几年时间。当入水量超过水电站需求时，多余的水通过一条可逆渠道输送并预泵入布斯科布拉托水库。该水库中的总硬度和碳酸盐硬度低于采蒂纳河和典型的喀斯特水流，因为该水库中的水主要来自地表水源，包括许多流量波动大的泉水、山洪和降雨。过去几年进行的测量显示，硝酸盐含量以及大肠杆菌显著增加，总磷含量增加幅度较小。根据基于卡尔森营养水平指数的总磷含量，水质被评估为中营养，质量低于采蒂纳河上游的佩鲁察水库。后者的磷含量较低，被归类为贫营养和中营养之间。根据这些数据，采用沃伦韦德方程，该水中的总磷含量不应超过平均20毫克/立方米磷。结果表明，布斯科布拉托水库中的水没有使采蒂纳河下游段的水质恶化。
