摘要
Markov预测技术是应用 Markov链的相关预测的基本原理与方法来研究分析时间序列的变化规律 ,并预测其未来变化趋势的一种预报方法 ,适用于随机波动较大的预报问题。根据 Markov链原理 ,提出了一个用于龙羊峡水库年平均入库径流预报的离散随机过程模型。实测资料的验证结果表明 ,这种模型计算精度较高 。
The catchment above Tangnag station is the principal areas for runoff formation in the upper reaches of the Yellow River. For example, the water flows from the Tangnag Station account for 95% of the inflows into the Longyangxia Reservoir,the largest reservoir on the upper Yellow River. However, runoff in the upper Yellow River above the Tangnag has been decreasing recently due to the persisting drought in the basin, which not only greatly influences the economy and people's standards of living in the upper reaches, but also curbs the economic development and ecological environment imporvement within the Yellow River basin. As a result, the accurate prediction for the variation of the runoff at the Tangnag Station is indispensable for the efficient and logical exploitation of the water resources at the catchment scale, as well as determining the amount of water transported from other basin. However, sophisticated methods are not available at present to determine the variability of water flows, due to complexity of their intrinsic evolutions, and close and complicated relationships to climatic changes. In addition, precision of runoff prediction is greatly influenced by the difficulty in long term weather forecasting. To solve the above problems, a dispersal stochastic process model based on the Markov Chain was presented for forecasting the inflow into the Longyangxia Reservoir in this paper. This forecasting method is mainly applicable to the objects that are of biggish stochastic vibration. The results show that the calculated values can commendably tally with the measured values. Therefore, Morkov forecast model is of obvious advantage.
出处
《中国沙漠》
CSCD
北大核心
2000年第1期95-97,共3页
Journal of Desert Research
基金
国家"九.五"重点科技攻关项目!96-912 -0 1-0 2
96-912 -0 3 -0 3专题
国家自然科学基金!重点项目( 4 973 10 3 0 )
关键词
离散随机过程
MARKOV链
径流预报
水库
入库径流
dispersal stochastic process
Markov Chain
runoff forecasting
probability transfer matrix
