地域研究与开发
地域研究與開髮
지역연구여개발
Areal Research and Development
2014年
5期
127~131
,共null页
出山径流 R S分析 循环周期 灰色预测 黑河
齣山徑流 R S分析 循環週期 灰色預測 黑河
출산경류 R S분석 순배주기 회색예측 흑하
out-mountainous runoff; R/S analysis; the average cycle; grey prediction; Heihe River
径流过程具有分形和灰色特征。基于此,将R/S分析与灰色系统理论相结合,提出了R/S灰色预测模型以预报黑河出山径流量。针对1949-2011年莺落峡水文站年径流量资料,首先进行R/S分析,确定径流量序列的Hurst指数和平均循环周期T;然后在一个周期内进行径流量灰色预测。结果表明:黑河出山径流量循环周期在20—25年之间,在进行R/S灰色预测时,取T=20为宜;R/S灰色预测结果的精度高于直接进行灰色预测。该方法拓宽了分形和灰色理论在径流过程研究的应用范围,为径流量的科学预测提供了一种新方法。
徑流過程具有分形和灰色特徵。基于此,將R/S分析與灰色繫統理論相結閤,提齣瞭R/S灰色預測模型以預報黑河齣山徑流量。針對1949-2011年鶯落峽水文站年徑流量資料,首先進行R/S分析,確定徑流量序列的Hurst指數和平均循環週期T;然後在一箇週期內進行徑流量灰色預測。結果錶明:黑河齣山徑流量循環週期在20—25年之間,在進行R/S灰色預測時,取T=20為宜;R/S灰色預測結果的精度高于直接進行灰色預測。該方法拓寬瞭分形和灰色理論在徑流過程研究的應用範圍,為徑流量的科學預測提供瞭一種新方法。
경류과정구유분형화회색특정。기우차,장R/S분석여회색계통이론상결합,제출료R/S회색예측모형이예보흑하출산경류량。침대1949-2011년앵락협수문참년경류량자료,수선진행R/S분석,학정경류량서렬적Hurst지수화평균순배주기T;연후재일개주기내진행경류량회색예측。결과표명:흑하출산경류량순배주기재20—25년지간,재진행R/S회색예측시,취T=20위의;R/S회색예측결과적정도고우직접진행회색예측。해방법탁관료분형화회색이론재경류과정연구적응용범위,위경류량적과학예측제공료일충신방법。
Runoff process has both fractal and gray characteristics. So R/S gray prediction model for predic- ting runoff sequence is proposed by means of combining gray system theory with R/S analysis. Based on annual runoff data from 1949 to 2011 in Yingluoxia Station, the out-mountainous runoff sequences of Heihe River is ana- lyzed, and use R/S method, to determine the Hurst exponent and the average cycle firstly; then in one cycle, out- mountainous annual runoff is predicted by gray. It is showed that the average cycle ( T ) of out-mountainous annual runoff sequence of Heihe River is about 20 - 25 years, and if T was 20, the result of gray prediction would best. The prediction accuracy of R/S gray prediction model is 91.04%, which is higher than the accuracy of the gray prediction model. R/S gray prediction model enlarges the applied scope of fractal theory and grey model, and pro- vides a new scientific method for predicting annual runoff sequence.