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首页> 外文会议>International symposium on isotopes in water resources management >DETERMINATION OF HYDRODYNAMIC PARAMETERS IN THE PAIVA CASTRO RESERVOIR USING ARTIFICIAL TRITIUM
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DETERMINATION OF HYDRODYNAMIC PARAMETERS IN THE PAIVA CASTRO RESERVOIR USING ARTIFICIAL TRITIUM

机译：人工RIT测定帕瓦斯卡斯特罗储层中的水力参数

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The Paiva Castro reservoir is used to supply about 67% of the total water consumed in the Sao Paulo metropolitan region. The reservoir contains about 32 × 10~6 m~3 and has a normal flow rate of about 30 m~3/s. A tracer experiment using 10 Ci (37 × 10~(10) Bq) of artificial tritium was performed in the reservoir. The results obtained were used to calibrate a mathematical model of tracer transport. The purpose of the experiment was to determine the mean transit time of water, mean water velocity, hydrodynamic dispersion, volume of active water in the reservoir, and possible losses of tracer into the stagnant zone. The mathematical model of tracer transport through the reservoir was calibrated using tritium concentration curves measured in different parts of the reservoir. It was anticipated that this calibrated model could be used to predict the movement of non-reactive pollutants through the reservoir in the case of an accident. The line injection, in four equally distributed points perpendicular to the flow direction, produced a homogeneous distribution of tracer mass at the entrance to the reservoir. The measurements of tritium concentrations in different cross-sections of the reservoir showed that about 45 % of the tracer mass (up to the flow distance of about 4200 m) was transported through the right part of the reservoir. After 7100 m the tracer was equally distributed perpendicularly to the streamlines. The mean water velocity through the reservoir was 0.016 m/s and the dispersivity was 456 m. The volume of mobile water in the aquifer between the injection point and the outflow to the pumping station was found to be 13 10 10~6 m~3. Over the last 1000 m of flow path, about 15% of tracer mass was lost in a large, nearly stagnant zone in the southwest part of the reservoir.
机译：帕瓦卡斯特罗水库用于供应圣保罗市区约67％的总用水量。储层约32×10〜6 m〜3，正常流量约30 m〜3 / s。在储层中进行了使用10 Ci（37×10〜（10）Bq）人工tri的示踪实验。获得的结果用于校准示踪剂运输的数学模型。实验的目的是确定水的平均通过时间，平均水速，流体动力扩散，储层中活泼水的量以及示踪剂进入停滞区的可能损失。使用在储层不同部位测得的concentration浓度曲线，对示踪剂在储层中的运移数学模型进行了校准。可以预料的是，在发生事故的情况下，可以使用该校准模型来预测非反应性污染物通过储层的运动。在垂直于流动方向的四个均匀分布的点中，管线注入在储层入口处产生了示踪剂质量的均匀分布。对储层不同横截面中concentrations浓度的测量结果表明，约有45％的示踪剂质量（达到约4200 m的流动距离）通过了储层的右侧。在7100 m之后，示踪剂垂直于流线均匀分布。通过水库的平均水速为0.016 m / s，分散度为456 m。发现注入点与泵站出水口之间的含水层中的流动水量为13 10 10〜6 m〜3。在水流的最后1000 m，在储层西南部一个几乎停滞的大区域中，约15％的示踪剂质量损失了。

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