检索结果-南通市图书馆

Effect of Climate Variability and Human Activities on runoff in the Jinghe River Basin, Northwest China

Journal of Mountain Science 2015年第2期12卷 358-367页

作者： YAO Jun-qiang ZHAO Qiu-dong LIU Zhi-hui School of Resources and Environment Science Key Laboratory of Oasis Ecology of Ministry of Education Xinjiang University Xinjiang Climate Center Xinjiang Meteorological Administration Institute of Desert Meteorology China Meteorological Administration Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Institute of Arid Ecology and Environment Xinjiang University

Much attention has recently been focused on the effects of climate variability and human activities on the runoff. In this study, we analyzed 56-yr(1957–2012) runoff change and patterns in the Jinghe River Basin(JRB) in the arid region of northwest China. The nonparametric Mann–Kendall test and the precipitation-runoff double cumulative curve(PRDCC) were used to identify change trend and abrupt change points in the annual runoff. It was found that the runoff in the JRB has periodically fluctuated in the past 56 yr. Abrupt change point in annual runoff was identified in the JRB, which occurred in the years around 1964 and 1996 dividing the long-term hydrologic series into a natural period(1957 – 1964) and a climate and man-induced period(1965 – 1996 and 1997 – 2012). In the 1965 – 1996 period, human activities were the main factor that decreased runoff with contribution of 88.9%, while climate variability only accounted for 11.1%. However,the impact of climate variability has been increased from 11.1% to 47.5% during 1997 – 2012, showing that runoff in JRB is more sensitive to climate variability during global warming. This study distinguishes theeffect of climate variability from human activities on runoff, which can do duty for a reference for regional water resources assessment and management.

关键词： Water resource runoff Climate variability Precipitation Jinghe River Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Glacier runoff variation and its influence on river runoff during 1961–2006 in the Tarim River Basin, China

引用

Science China Earth Sciences 2010年第6期53卷 880-891页

作者： Xin Gao BaiSheng Ye ShiQiang Zhang ChengJun Qiao XiaoWen Zhang State Key Laboratory of Cryospheric Sciences CAREERI Chinese Academy of Sciences Lanzhou China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China The Resource Environment and Urban and Rural Planning Department Lanzhou Commercial College Lanzhou China

Using monthly precipitation and temperature data from national meteorological stations, 90 m resolution DEM and a digital vector map of modern glaciers from the Chinese Glacier Inventory, the glacier mass balance and glacier runoff in the Tarim River Basin (TRB), China, were estimated based on a monthly degree-day model for 1961–2006. The results suggest that the modified monthly degree-day model can simulate the long-term changes in glacier mass balance and glacier runoff, which have been confirmed by short-term observation data and other results in literatures. The characteristics and trends of mass balance and glacier runoff variation were analyzed. It was found that the mean annual glacier mass balance during 1961–2006 was ?139.2 mm per year and the cumulative mass balance over the 46 year period was ?6.4 m in the TRB. The glacier mass balance displayed a clear decreasing trend over the entire TRB during 1961–2006. The average annual glacier runoff in the TRB was 144.16×108 m3 for 1961–2006. The results also show that glacier runoff has increased in the last 46 years, especially since the 1990s with 85.7% of the increased river flow being derived from the increased glacier runoff caused by loss of ice mass. Over the entire TRB, glacier runoff accounts for 41.5% of the total river flow during 1961–2006. The impact of glacier runoff on river flow has increased in the TRB as a result of glacier shrinkage.

关键词： glacier mass balance degree-day model glacier runoff Tarim River Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Theory and practice of runoff space-time distribution

引用

Science China(Technological Sciences) 2004年第Z1期47卷 90-105页

作者： Thomas M. Over Department of Geology/Geography Eastern Illinois University Charleston IL 61920 USA

Based on the domestic and foreign concerning researches, this paper submits the runoff space-time distribution theory which shows evident scientific significances and powerful practical functions. On the basis of digital basin unit cell deriving from the digital elevation model (DEM) and assumption of linear confluence, this theory has been applied successfully to the runoff correlation researches in humid regions. In order to prove the adaptability of the theory in arid and semi-drought regions, this paper is used to the runoff correlation analysis in Wuding River basin——a tributary of Yellow River Basin, and has gained preliminary effective verification.

关键词： runoff space-time distribution, theory, the Wuding River, correlation coefficient, practice.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Validating the runoff from the PRECIS Model Using a Large-Scale Routing Model

引用

Advances in Atmospheric Sciences 2007年第5期24卷 855-862页

作者：曹丽娟董文杰许吟隆张勇 Michael SPARROW Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029 Graduate University of Chinese Academy of SciencesBeijing100049 National Climate Center China Meteorological Administration Beijing 100081 Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Beijing 100081 Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029 National Climate CenterChina Meteorological AdministrationBeijing 100081 Institute of Environment and Sustainable Development in AgricultureChinese Academy of Agricultural SciencesBeijing 100081 International CLIVAR Project Office National Oceanography Centre SouthamptonUK

The streamflow over the Yellow River basin is simulated using the PRECIS （Providing REgional Climates for Impacts Studies） regional climate model driven by 15-year （1979-1993） ECMWF reanalysis data as the initial and lateral boundary conditions and an off-line large-scale routing model （LRM）. The LRM uses physical catchment and river channel information and allows streamflow to be predicted for large continental rivers with a 1°×1° spatial resolution. The results show that the PRECIS model can reproduce the general southeast to northwest gradient distribution of the precipitation over the Yellow River basin, The PRECIS- LRM model combination has the capability to simulate the seasonal and annual streamflow over the Yellow River basin. The simulated streamflow is generally coincident with the naturalized streamflow both in timing and in magnitude.

关键词： regional climate model large-scale routing model model validation runoff the Yellow River

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Incorporating Groundwater Dynamics and Surface/Subsurface runoff Mechanisms in Regional Climate Modeling over River Basins in China

引用

Advances in Atmospheric Sciences 2013年第4期30卷 983-996页

作者：秦佩华谢正辉袁星 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Department of Civil and Environmental Engineering Princeton University

To improve the capability of numerical modeling of climate-groundwater interactions, a groundwater component and new surface/subsurface runoff schemes were incorporated into the regional climate model RegCM3, renamed RegCM3_Hydro. 20-year simulations from both models were used to investigate the effects of groundwater dynamics and surface/subsurface runoff parameterizations on regional climate over seven river basins in China. A comparison of results shows that RegCM3_Hydro reduced the positive biases of annual and summer （June, July, August） precipitation over six river basins, while it slightly increased the bias over the Huaihe River Basin in eastern China. RegCM3_Hydro also reduced the cold bias of surface air temperature from RegCM3 across years, especially for the Haihe and the Huaihe river basins, with significant bias reductions of 0.80~C and 0.88~C, respectively. The spatial distribution and seasonal variations of water table depth were also well captured. With the new surface and subsurface runoff schemes, RegCM3_Hydro increased annual surface runoff by 0.11 0.62 mm d 1 over the seven basins. Though previous studies found that incorporating a groundwater component tends to increase soil moisture due to the consideration of upward groundwater recharge, our present work shows that the modified runoff schemes cause less infiltration, which outweigh the recharge from groundwater and result in drier soil, and consequently cause less latent heat and more sensible heat over most of the basins.

关键词： groundwater runoff river basin regional climate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A comparative assessment of catchment runoff generation and forest productivity in a semi-arid environment

引用

International Journal of Digital Earth 2016年第10期9卷 942-962页

作者： Cenk Donmez Suha Berberoglu Department of Landscape Architecture University of CukurovaAdanaTurkey

Understanding the dynamic interactions between forest ecosystems and water in the Mediterranean region is essential for increasing ecosystem *** if many studies were implemented to analyse the variations of water and net primary productivity(NPP)in the last decade,this is still an important research question especially for the Eastern Mediterranean,where the research attempts are *** main objective of this study was to carry out a comparative analysis of catchment runoff generation and forest NPP and to reveal their temporal dynamics at basin scale in a semi-arid Mediterranean *** methodology consisted three steps:(i)estimating catchment runoff generation by implementing process-based J2000 modelling suite,(ii)modelling NPP of the land cover/use types by adapting an ecosystem-process model(BIOME-Biogeochemical cycles)and(iii)assessing the spatio-temporal variability of NPP and runoff dynamics by incorporating the modelling results with multiple regression *** simulations showed that temperature highly contributed to NPP variations of needle-leaf forests and *** multiple regression analysis also indicated that runoff was influenced by elevation,precipitation and forest *** relationship showed that the inter-annual variability in forest NPP would relate to the variations in runoff distribution across a small Mediterranean subcatchment.

关键词： NPP runoff modelling Mediterranean remote sensing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Ryegrasses on Soil runoff and Sediment Control

引用

Pedosphere 2008年第1期18卷 131-136页

作者： ZHOU Zheng-Chao SHANGGUAN Zhou-Ping College of Tourism and Environmental Sciences Shaanxi Normal University Xi'an 710062 (China) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling Shaanxi 712100 (China) Northwest A & F University Yangling Shaanxi 712100 (China)

Living plants and plant roots can reduce runoff and soil erosion. Using a rain simulator, a series of soil erosion experiments were conducted to study the influence of living roots and canopies of ryegrasses （Lolium perenne L.） during the growing season on sediment yields and runoff of a silt loam soil. The results indicated that during the growing season, decrements in runoff and sediment yields increased with time. Sediment yields （τ^2 = 0.999） and decrements in runoff （τ2 = 0.946） were closely related to the root surface area density. The contributions of roots and canopies of ryegrasses to the reductions in runoff and sediment yields were different. Canopies usually contributed more to the runoff decrement than the roots, whereas roots contributed up to 96% of the decrease in sediment yields in the late stage of the growing season.

关键词： canopy root runoff ryegrass sediment yield

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of microrelief features of tillage methods under different rainfall intensities on runoff and soil erosion in slopes

引用

International Soil and Water Conservation Research 2024年第2期12卷 351-364页

作者： Xinkai Zhao Xiaoyu Song Lanjun Li Danyang Wang Pengfei Meng Huaiyou Li State Key Laboratory of Eco-hydraulics in Northwest Arid Region Xi'an University of TechnologyXi'an710048ShaanxiChina Beijing Guanting Reservoir Management Office Huailai075441ZhangjiakouChina Xifeng Experiment Station of Soil and Water Conservation Yellow River Conservancy CommitteeQingyang745000GansuChina

Tillage methods play a crucial role in controlling rainwater partitioning and soil *** study utilized rainfall simulation experiments to investigate the impact of four tillage methods(manual digging(MD),manual hoeing(MH),traditional ploughing(TP),and ridged ploughing(RP))on runoff and soil erosion at the plot *** smooth slope(SS)was used as a *** intensities of 30,60,90,and 120 mm h−1 were *** study revealed that tillage altered rainwater distribution into depression storage,infiltration,and *** reduces runoff and increases *** four tillage methods(30–73%)increased the proportion of rainwater converted to infiltration to varying degrees compared to the SS(22–53%).Microrelief features influenced the role of tillage methods in soil *** roughness and depression storage accounted for 79%of the variation in sediment *** four tillage methods reduced runoff by 2.1–64.7%and sediment yield by 2.5–77.2%.Moreover,increased rainfall intensity weakens the ability of tillage to control soil *** rainfall intensity increased to 120 mm h−1,there was no significant difference in runoff yield among RP,TP,MH,and ***,assessing the effectiveness of tillage in reducing soil erosion should consider changes in rainfall ***,the cover management(C)factor of the RUSLE was used to assess the effects of different tillage methods on soil ***,the C factor values for tilled slopes are in the order MH>TP>RP>MD with a range of 0.23–*** the surface roughness increases,the C factor tends to decrease,and the two are exponential functions(R2=0.86).These studies contribute to our understanding of how different tillage methods impact runoff and soil erosion in sloped farmland and provide guidance for selecting appropriate local manual tillage methods.

关键词： Simulated rainfall Tillage methods Microrelief features runoff Soil erosion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impacts of 1.5℃ and 2.0℃ Global Warming on runoff of Three Inland Rivers in the Hexi Corridor, Northwest China

引用

Journal of Meteorological Research 2020年第5期34卷 1082-1095页

作者： Yujie WANG Yong WANG Hongmei XU Key Laboratory of Meteorological Disaster Ministry of Education/International Joint Research Laboratory on Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&TechnologyNanjing 210044 School of Atmospheric Sciences Nanjing University of Information Science&TechnologyNanjing 210044 Chongqing Climate Center Chongqing Meteorological ServiceChongqing 401147 National Climate Center China Meteorological AdministrationBeijing 100081

Basin-scale projections of river runoff at different warming levels provide useful information for climate change adaptation. In this study, we investigated changes in the projected climate and simulated runoff under 1.5℃ and 2.0℃ global warming of three inland rivers in the Hexi Corridor: the Shiyang River(SYR), the Heihe River(HHR),and the Shule River(SLR). The change in climate was projected based on five global climate models(GCMs) under three representative concentration pathways(RCPs), and the change in runoff was simulated based on the Soil and Water Assessment Tool(SWAT) hydrological model. Furthermore, the uncertainties in projected climate change and simulated runoff constrained by the GCMs and RCPs were quantified. The results indicate that, compared with the baseline period(1976–2005), there is a 1.42–1.54℃ increase in annual air temperature and 4%–12% increase in annual mean precipitation in the three river basins under 1.5℃ global warming, while there is a 2.09–2.36℃ increase in annual air temperature and 5%–11% increase in annual mean precipitation under 2.0℃ global warming. The simulated annual runoff of the SYR decreases by 4% under 1.5℃ global warming, that of the HHR decreases by 3% and 4%, while that of the SLR increases considerably by 10% and 11% under 1.5℃ and 2.0℃ global warming, respectively. The additional 0.5℃ global warming results in an annual air temperature increase of 0.67–0.82℃, a change of -1% to 1% in annual mean precipitation, and a change of -1% to 5% in simulated runoff. The simulated annual runoff has greater uncertainty. The simulations indicate substantial and consistent warming in autumn and winter in the three basins, relatively drier summer and autumn in the SYR and HHR basins, and a relatively drier autumn in the SLR basin. The simulated monthly runoff shows more complex changes with large uncertainties constrained mainly by the GCMs.

关键词： climate change runoff Shiyang River(SYR) Heihe River(HHR) Shule River(SLR)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impacts of Land Cover Changes on runoff and Sediment in the Cedar Creek Watershed,*** River,Indiana,United States

引用

Journal of Mountain Science 2008年第2期5卷 113-121页

作者： JIANG Xiaobo Chi-hua Huang Fushui Ruan Key Laboratory of Mountain Hazards and Surface Process Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 Siehuan China USDA ARS National Soil Erosion Research Laboratory ~75 S Russell Street West Lafayette IN 47907 United States Water and Soil Conservative Department Fuzhou 35ooo3 Fujian China

The relation between runoff and sediment and land cover is investigated in the Cedar Creek Watershed （CCW）, located in Northeastern Indiana, United States. The major land cover types in this watershed are cultivated land, woodland and pasture /Conservation Reserve Program （CRP）, which account for approximate 90 % of the total area in the region. Moreover, land use was changed tremendously from aooo to 9004, even without regarding the effect of the crop rotation system （corn ＆ soybean）. At least 49 % of land cover types were changed into other types in this period. The land cover types, ranking by changing area from high to low series, are rye, soybean, corn, woodland and pasture/CRP. The CCW is divided into 21 subwatersheds, and soil and water loss in each sub-watershed is computed by using Soil and Water Assessment Tool （SWAT）. The results indicate that the variations in runoff and sediment have positive relation to the area of crops （especially corn and soybean）; sediment is more sensitive to land cover changes than runoff; more heavy rainfall does not always mean more runoff because the combination of different land cover types always modify runoff coefficient; and rye, soybean and corn are the key land cover types, which affected the variation in runoff and sediment in the CCW.

关键词： Cedar Creek watershed Soil and Water Assessment Tool land cover change runoff sediment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：