For many years, the Dead Sea suffers from an annual inflow deficiency of about one billion cubic meters, flood and baseflow. The water level changes are related to the majority of surface water inflows diverted for irrigation purposes, in addition to intensive loss of water by the high rate of evaporation and industrial water use. This causes the Dead Sea water level to decline about 35 m within the last 50 years for a long-term average of about 0.79 m per year. The changes in the hydrochemical composition were simulated experimentally to determine the changes that take place as a function of brine water evaporation level and its density. The Total Dissolved Solids (TDS) and the density of the Dead Sea water varies as a function of its water evaporation level changes. It was found that the density variation is not following a linear function with respect to water volume changes. But it follows the total amount of precipitate that occurred at different water levels. The electrical conductivity (EC) changes with respect to time and the prevailing temperature. There was no formula to calculate the high salinity of brine water above the normal ocean water. Consequently, the EC measurements were adopted to represent the Dead Sea water salinity. But in this research a converging factor (0.80971) has been found to convert the TDS values into salinity values. On contrary, the pH values revealed an inverse relationship with respect to the evaporation levels.

中文翻译：

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死海卤水化学性质随水位降低而变化的结果

多年以来，死海每年遭受约10亿立方米的洪水，洪水和基流的短缺。水位的变化与大部分用于灌溉目的的地表水流入有关，此外，由于高蒸发率和工业用水的使用会大量损失水。这导致死海水位在过去50年中下降了约35 m，长期每年平均约为0.79 m。通过实验模拟水化学成分的变化，以确定随盐水蒸发量及其密度变化的变化。总溶解固体（TDS）和死海水的密度随其水蒸发量的变化而变化。已经发现，密度变化相对于水量变化不遵循线性函数。但是它遵循在不同水位下发生的沉淀总量。电导率（EC）随时间和主​​要温度变化。没有公式可以计算出盐水比正常海水高的盐度。因此，采用EC值来表示死海的盐度。但是在这项研究中，已经发现收敛因子（0.80971）将TDS值转换为盐度值。相反，pH值显示出与蒸发水平成反比关系。电导率（EC）随时间和主​​要温度变化。没有公式可以计算出盐水比正常海水高的盐度。因此，采用EC值来表示死海的盐度。但是在这项研究中，已经发现收敛因子（0.80971）将TDS值转换为盐度值。相反，pH值显示出与蒸发水平成反比关系。电导率（EC）随时间和主​​要温度变化。没有公式可以计算出盐水比正常海水高的盐度。因此，采用EC值来表示死海的盐度。但是在这项研究中，已经发现收敛因子（0.80971）将TDS值转换为盐度值。相反，pH值显示出与蒸发水平成反比关系。