摘要
根据小浪底水库自身特点对水温分层类型进行了判别,认为其水温分层为稳定分层。采用水库水温统计数学模型对水温进行了模拟,并运用最小二乘法对模型参数进行了拟合,结果表明:当年11月至翌年3月,水温总体上呈垂向均匀分布;从4月至10月(升温期到降温初期),水温呈分层状态,热量从表层向下传递,温跃层厚度为5~15 m;水库下层水温年内变幅较上层小,且上层升温幅度大于下层,下层水温的年内变化较上层有明显的滞后;0~50 m水深的计算值与实测值相比,年平均水温的相对误差在-0.6%~0.6%之间,水温年变幅的相对误差在-4.5%~4.1%之间,水温年内变化相位的相对误差在-1.3%~1.3%之间,表明计算值具有较高的精度。
It discriminates the stratification of water temperature according to the self-characteristics of the Xiaolangdi Reservoir and deems that the stratification of water temperature is stable one.It simulates the water temperature by using reservoir water temperature statistic model and fits model parameters by using least-squares method.The outcomes show that in the period from November to March of the following year,generally water temperature is in vertical uniform distribution;from April to October(from tem...
出处
《人民黄河》
CAS
北大核心
2008年第2期77-78,80,共3页
Yellow River
关键词
最小二乘法
水温模型
坝前水温
小浪底水库
least-squares method
water temperature model
water temperature in front of dam
the Xiaolangdi Reservoir
