欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为了研究径流的长期演化模式及自记忆特征,采用自相关函数确定重构序列的回溯阶数,并构建基于经验模态函数（EMD）分解的灰色自记忆GM（1,N）预测模型。分析回溯阶和自相关函数之间关系,进一步阐明自记忆原理在水文领域应用的合理性。结果表明,黄河花园口86年天然径流序列存在长期演化的自记忆特征,演化模式可由7个内在本征模态函数（IMF）和趋势项组成;受流域水资源开发及气候变化因素影响,1965年后,径流演化模式发生变化,出现周期衰减现象;回溯阶与时间序列自相关函数变化相对应,序列平稳化后,依据自相关函数确定回溯阶数,可提高自记忆模型预测精度。
英文摘要：
To better understand the evolution modes and self-memory characteristics of the Yellow River annual runoff,a gray self-memory prediction model is developed by using empirical mode decomposition theory.A auto-correlation function is adopted to define the backdate orders of this model to improve its accuracy.The results show that the runoff series at Huayuankou gauge can be decomposed into seven intrinsic mode functions（IMF） and a tendency function.Since 1965 the evolution modes and periodicity of runoff series has changed under the influences by water resources development and climate change in this river basin.
同期刊论文项目
同项目期刊论文
Calculating actual crop evapotranspiration under soil water stress conditions with appropriate numer
Remote sensing temporal and spatial patterns of evapotranspiration and the responses to water manage
Estimation of evapotranspiration using a remote sensing model over agricultural land in the North Ch
Impact of Urbanization on Rainfall-Runoff Process in a City: the Flood from 8 to 9 August 2007 in Xi
Development of a soil-plant-atmosphere continuum model (HDS-SPAC) based on hybrid dual-source approa
Temporal Downscaling of Crop Coefficient and Crop Water Requirement from Growing Stage to Substage S
Detecting the effect of land-use change on streamflow, sediment and nutrient losses by distributed h
Interannual and seasonal variability in evapotranspiration and energy partitioning over an irrigated
Assessing the impacts of climate variability and human activities on annual runoff in the Luan River
Analysis of the Diurnal Pattern of Evaporative Fraction and Its Controlling Factors over Croplands i
Temporal variation of over-bank flooding of Wei River and its impact on a riparian wetland in Xi'an,
Effects of climate variability and land-use change on stormwater runoff in Xi'an, China for the past
Combining crop coefficient of winter wheat and summer maize with remotely-sensed vegetation index fo
The role of run-on for overland flow and the characteristics of runoff generation in the Loess Plate
Salinity dynamics of wetland ditches receiving drainage from irrigated agricultural land in arid and
Coupling land surface and crop growth models for predicting evapotranspiration and carbon exchange i
Estimating epistemic and aleatory uncertainties during hydrologic modeling: An information theoretic
期刊信息
位置：