【摘 要】
：
Climate change and human activities were regarded as the two main factors for runoff change.Using observed stream discharge, there was a statistically significant decreasing trend for annual and month
【机 构】
：
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Resea
论文部分内容阅读
Climate change and human activities were regarded as the two main factors for runoff change.Using observed stream discharge, there was a statistically significant decreasing trend for annual and monthly runoff detected by Mann-Kendalls test, in the upper reaches of Luanhe River basin (URLRB), 1954-2000.With the break point analysis, the whole time series were divided into two periods: "natural period (1954-1970) and "impact period" (1971-2000)."Natural runoff" from 1954 to 2000, was reconstructed by variable infiltration capacity (VIC) model, in which the model parameters were calibrated in "natural period" representing the natural land cover conditions without the impact of human activities.By comparing the difference between observed stream flow and "natural stream flow", the contribution of climate change and human activities was quantitatively separated.The results indicated that climate change and human activities accounted for 49# and 51#, respectively, of the annual runoff decrease in URLRB.That meant the contribution of climate change on runoff was equal to it caused by human activities.Monthly, climate change decreased the stream flow in every month; otherwise, human activities increased the stream flow in four winter months: December to March, and reduced the stream flow in other eight months.The results could be a reference for water resources projection and management in URLRB and others catchments in northern China.
其他文献
本文围绕防控三峡支流水华、保障库区水质安全及改善下游生态环境三大目标,通过总结前人和"十一五"水专项研究成果,依据水利、资源、生态学原理,剖析溪洛渡、向家坝、三峡工程水沙关系、环境关系和功能关系,研究"长江-水库(群)-长江-湖泊"的生态环境演化关系,突破传统调度理论,提出了联合水库、动水环境、调和效益、协作调度的三峡水库群"联、动、和、协"的生态环境调度策略,同步构建嵌入保障长江中游江湖生态环境
环保疏浚作为一种新型的清理河湖底泥的工艺,具有清淤质量高、输送距离远、全天候作业等特点,作为典型平原区的海宁,首次引进环保疏浚工艺,本文结合洛塘河的疏浚、淤泥堆放、干化等实际,探索环保疏浚在海宁的发展与应用.
Increasing human population combined with increased economic growth and the concomitant consequences of increased urbanisation and associated environmental burdens coupled with climate change and wate
Flood risk assessment and risk level zonation is very important for preventing the watershed flood disaster and making disaster mitigation plans.We establish a flood disaster risk assessment model bas
Typhoons are among the most devastating of natural disasters.Accurate inundation forecasts are necessary for flood warning and mitigation, and the development of real-time flood forecasting models has
Along the coastal area, storm surge, an abnormal rise of water generated over and above the predicted astronomical tides, severely threaten life and property, which is associated with low pressure wea
The navigation on the Shahe River has sustained for a long time.But currently it is unnavigable from Luohe to Pingdingshan, which restricts the economic development in the hinterland, for the reason o
China has recognized sponge city as a means to solve water shortage, combat inundation and water quality problems.The concept of sponge city is to implement low impact development (LID) at a large sca
Oxygen transfer and the energy dissipation by the flow types at the stepped weir structure were performed through hydraulic experiments.Nappe flow occurs at low flow rates and for relatively small ste
Analysis of the rules for runoff evolutionof Kwanza River under the background of climate change is of significant importance to the multipurpose use of water resources in Angola.This paper, based on