淀山湖湖水中太阳辐射能的分布

照射在湖面上的光,由于反射作用和散射作用,不能全部进入水中。进入水中的光也由于吸收作用,随着深度的增加很快地衰减,其衰减的程度因消光系数不同而有很大差异。湖水的消光系数是湖水本身和水中悬浮颗粒,特别是溶于水中的有色物质的吸收作用的总和。通过试验建立了淀山湖水光能衰减的计算公式,式中的变量系数因水面光强和湖水透明度变化而不同,并建立了计算变量系数的经验公式。用公式计算得到的水中太阳能的分布与实际测量的结果,没有发现显著的差异。

Distribution of the Solar Radiant Energy Within the Water in Lake Dianshan

Due to the reflecting and scattering reaction of the water, the light passes through the lake incompletely. Light attenuats rapidly by the absorption of the water as the depth of the lake increases. The light attenuation at the water varies greatly as extinction coefficient changes. The extinction coefficient of the water is the sum of absorption by the water itself, by particles suspended in the water, and especially by dissolved color substances. The calculating equation of the solar radiation attenuation of water is established by experiments. The variation of the coefficient of the equation is related to the intensity of water surface and the Sacchi disc transparency of the water. An experimental equation is established for calculating the coefficient. There is no significant difference between the data from the calculating equation and the results from the direct measurement.