检索结果-南通市图书馆

Ecological and environmental water demand of the lakes in the Haihe-Luanhe Basin of North China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2002年第2期14卷 234-238页

作者： LiuJL YongZF StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControl InstituteofEnvironmentalScienceBeijingNormalUniversityBeijing100875China StateKeyJointLaboratoryofEnvironmentalSimulationandPollu

The purpose of this paper is to present a brief concept of the ecological and environmental water demand of lake. The present situation and affecting factors of lake ecological system in the Haihe\|Luanhe Basin of North China was analyzed. The calculating method of the ecological and environmental water demand of the lake basis on the water body and the calculating method of the ecological and environmental water demand of the lake basis on the aquatic ecosystem, wetland and vegetation were compared and discussed. As the examples of Baiyangdian Lake and Beidagang Lake in Haihe\|Luanhe river basin, the ecological and environmental water demand of the two lakes was calculated to be 27×10\+8m\+3. It is 6.75 times to the water demand according to the calculating method of the ecological and environmental water demand of the lake basis on the water body. The research result indicated: (1) The calculating methods of the ecological and environmental water demand of the lake basis on the aquatic ecosystem should be better than only basis on the water body of lake. (2) The data, such as area of the vegetation kind around and in the lake, the vegetation coefficient, the evaporating amount of the vegetation and the vegetation water demand itself around and in the lake are lack and urgent need. Some suggestions for controlling and regulating the water resource of the lake in North China were proposed.

关键词： eco\|environment water demand lake the Haihe\|Luanhe Basin

Modeling and simulation of industrial water demand of Beijing municipality in China

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2010年第1期4卷 91-101页

作者： Shouke WEI Alin LEI Shafi Noor ISLAM Department of Ecosystem and Environmental Informatics Brandenburg University of Technology03046 CottbusGermany The Changjiang water Resources Protection Institute Wuhan 430051China

Statistic and econometric regression models were established in this study to analyze and predict industrial water demand,water deficits,and their future uncertainty in Beijing—a Chinese city with a severe water stress problem.A forecasting model was selected based on a modeling evaluation by comparing predictions with *** scenarios were designed to simulate and analyze the future uncertainty of industrial water demand and the water deficit of *** modeling results for industrial water demand suggested that Beijing industry would face a water deficit between 3.06×10^(8)m^(3)in 2008 and 2.77×10^(8)m^(3)in 2015,though its industrial water demand would decrease from 6.31×10^(8)m^(3)to 4.84×10^(8)m^(3)during this period of *** from simulated scenario illustrated that,due to the extreme water scarcity situation,industry in Beijing would still face a serious water deficit problem even with a very optimistic scenario for the future.

关键词： water scarcity water demand water deficit modeling industry scenario Beijing

Surface water Potential Assessment and water demand Evaluation (A Case of Dabus watershed, Blue Nile Basin)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational water, Energy, and Environmental Engineering 2021年第4期10卷 155-168页

作者： Bilal Kemal Dereje Adeba water Resources and Irrigation Engineering Engineering College Asosa University Asosa Ethiopia Hydraulic and water Resources Engineering Engineering College Wollega University Nekemte Ethiopia

Dabus sub-basin is one of the main tributaries of Blue Nile with a considerable surface water potential which can be used for hydro power, irrigation, and water supply. Lack of studies regarding surface water potential and demands at the sub-basin level is the reason why this potential was underutilized. The objective of this study is to assess the surface water potential and evaluate the current and future demand by using water Evaluation and Planning (WEAP) model at Dabus sub-basin. The model was constructed on four different scenarios starting from the current account (2020) wherein all the data is filled into the model to estimate the surface water potential and demands for different sectors. The scenarios include Scenario 1: reference scenario;Scenario 2: Change in population growth rate;Scenario 3: Irrigation water demand projection;and Scenario 4: Increased domestic water demand. The scenario has helped in analyzing “what if” questions. For all the scenarios the overall demand, coverage and unmet demand were analyzed based on three-time horizon as (2020-2030, 2030-2040, and 2040-2050). The model estimated the average annual flow as 6.536 Billion Cubic Meter (BCM) which is generated from annual precipitation of 14.987 BCM. The model showed 100% demand coverage for all the scenarios except the irrigation demand projection scenario which have unmet demand on some of the months of the year.

关键词： Dabus Sub-Basin Scenarios Surface water Potential water demand WEAP

Study of Ecological water demand of Rivers in Shenyang City, Northeastern China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Groundwater Science and Engineering 2014年第1期2卷 73-77页

作者： Yun TANG Ke-wang TANG Yan WANG Ai-min YANG Dept. of water Resources China Institute of Water Resources & Hydropower Research (IWHR)

The ultimate goal of the protection and restoration of water ecosystem is intended to facilitate the healthiness of ecosystems in rivers and lakes, and the basic premise of river healthiness is to ensure the ecological water demand of rivers. Shenyang City is the economic and cultural center of Northeastern China, and most rivers in the territory of Shenyang City are plagued with the ecology and environment problems such as dry-up of river way, wetland shrinkage and groundwater overdraft. In protection and restoration of water ecosystem, Shenyang City should first study the ecological water demand of rivers. In this paper, we first defined the connotation, composition and calculation method of ecological water demand of rivers and selected eight major rivers in Shenyang City for ecological water demand study and calculation according to the characteristics of the rivers and water resources conditions in Shenyang City. We calculated the basic eco-environmental water demand and consumptive water demand for evaporation and seepage of river ways respectively and thus obtained the total eco-environmental water demand for eight rivers. In total eco-environmental water demand of rivers, consumptive water demand for evaporation and seepage of river ways accounts for 51% and the eco-environmental water demand of rivers accounts for 49%.

关键词： water demand Ecosystem Shenyang City

PRESSURE OF water SHORTAGE ON AGRICULTURE IN ARID REGION OF CHINA

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Geographical Science 2003年第2期13卷 124-129页

作者： LI Xin (University of Science and Technology of Suzhou, Suzhou 215011, P.R.China) University of Science and Technology of Suzhou Suzhou P. R. China

The arid areas in China are mainly located in North China and NorthwestChina. The North China is the main region for food production. There is 31. 19% of the totalfarmland and 26. 01% of the total population, but only 6. 14% of the available water resources ofChina. Groundwater is over pumped (6. 53 X 10~9m^3 every year) in the regions of Beijing, Tianjin,and Hebei Province, so water supply could not meet the water demand there. The distribution of waterin Northwest China is uneven, some inland rivers and lakes are dried up, and desertification hasexpanded since river water in the upper and middle reaches is diverted for irrigation. Up to 2050,population will be up to 1. 6 X 10~9 in China, and industry will be developed fast, therefore 50% ofthe water supply will be used by industry and resident, and water for agriculture will be decreasedyear by year. In the coming 50 years, water demand for agriculture will be increased by 5. 6 x10^9m^3 in the Huanghe (Yellow) River valley, and by 1. 7 x 10~9m^3 in the Northwest China. It willbe impossible for the Huanghe River to meet the water demand, because it always dried up in the coldhalf year since 1984. To avoid water shortage of agriculture in the arid regions, it is necessaryto divert water from the Changjiang (Yangtze) River in the south of China, and to use waterefficiently. It is the best way to use drip irrigation in agriculture, recycle water in industry andresident use, and control water pollution. Otherwise water shortage in the arid regions willrestrict the development of agriculture in China.

关键词： water shortage water demand agriculture arid region of china

Measuring Tourist’s water Footprint in a Mountain Destination of Northwest Yunnan, China

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2011年第5期8卷 682-693页

作者： YANG Mingyu Luc HENS Robert DE WULF OU Xiaokun Institute of Ecology and Geobotany Yunnan University Kunming 650091 China Flemish Institute for Technological Research Mo12400 Belgium Department of Forest and water Management Universiteit Gent Gent 9000 Belgium

Monitoring and minimizing tourist’s water consumption is essential for the sustainable development of mountain destinations in the world. However, available data and a generally accepted protocol on such measurement are still limited. This study uses water footprint accounting to quantify tourist’s water demand in the Liming valley, a World Heritage site and a rapidly growing tourism destination in Northwest Yunnan, China. Both the water for direct and indirect use is taken into account based on the consumptive behavior of the tourists in the valley. Data were collected through guesthouse monitoring and a tourist survey in the 2005 tourist season. The results indicate that an average tourist leaves behind a footprint of 5.2 m3 on local water resources per day. Food production and waste dilution are the two most important water consumption factors. The results also show tourists consume more water than the local residents on per capita basis. This suggests more commitment is necessary to cope with this stress by individual tourists. Management implications to make water use more sustainable in mountain destinations are derived from this study.

关键词： Tourism Mountain destination water demand Footprint accounting Sustainable development Northwest Yunnan

Agricultural irrigation requirements under future climate scenarios in China

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2015年第2期7卷 224-237页

作者： Xiu Fang ZHU An Zhou ZHAO Yi Zhan LI Xian Feng LIU State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University College of Resources Science and Technology Beijing Normal University

Projecting future water demand, especially in terms of agricultural irrigation demand, as well as identifying high-risk areas and establishing appropriate water demand management has become increasingly important in China. Climate scenarios provide opportunities to predict future irrigation requirements(IRs). We examined changes in IRs and agricultural drought in response to rising greenhouse gas concentrations in China using eight global climate models from the Intergovernmental Panel on Climate Change Fourth Assessment Report. In this research, Northeast China, the North China Plain and the Yarlung Tsangpo River Valley area in southeastern Tibet were estimated to receive more precipitation in the future, whereas Southeast and Northwest China, especially the Junggar and Tarim basins in Xinjiang Uygur autonomous region, will receive less precipitation. IRs will undergo a significant increase in summer(June–August), especially in July, whereas the smallest increase was predicted to occur in autumn(September–November). Middle rice was identified as the greatest contributor to the increase in total IRs. The areas predicted to experience significant increases in IRs include Northwest China(the Tarim and Junggar basins in Xinjiang Uygur autonomous region, the Hexi Corridor in Gansu province and the Guanzhong Plain in Shaanxi province), Southeast China(especially Fujian province), and Southwest China(Yarlung Tsangpo River Valley area in Tibet and the Sichuan Basin).

关键词： agricultural drought water demand agricultural irrigation requirement climate change IPCC scenarios

The Impact of water Pricing Policy on Local Environment-An Analysis of Three Irrigation Districts in China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2007年第12期6卷 1472-1478页

作者： HAN Hong-yun ZHAO Lian-ge China Academy for Rural Development Zhejiang University Hangzhou 310029 P.R.China College of Economics Zhejiang Gongshang University Hangzhou 310035 P.R.China

As a high priority in dealing with the problem of water scarcity, the effect of water pricing policy remains a controversial issue, especially the environmental effect. Using household-level panel data of three irrigation districts （IDs） in the northern China, this paper probes the potential impact of water price rising on local environment. The examination shows that farmers will reduce the rice area as a response to the rising surface water prices. The changing cropping pattern will exert three-fold environmental impacts, including the dropping groundwater level resulting from the reduction of seepage and percolation of irrigated water and overexploitation of groundwater, the negative effect of non-point pollution from fertilizer and pesticide application, and the loss of field irrigation facilities. water pricing is not a valid means of significantly reducing agricultural water consumption due to the substitution of groundwater for surface water, it will lead to negative environmental effect. It is an imperative task for Chinese government to improve the management efficiency at IDs.

关键词： water pricing water demand irrigation district non-point pollution environmental effect

The driving effects of urbanization on economic growth and water use change in China： A provincial-level analysis in 1997-2011

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2015年第5期25卷 530-544页

作者： BAO Chao Institute of Geographic Sciences and Natural Resource Research CAS Beijing 100101 China Key Laboratory of Regional Sustainable Development Modeling CAS Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China

As one of the key issues in China＇s sustainable development, rapid urbanization and continuous economic growth are accompanied by a steady increase of water consump- tion and a severe urban water crisis. A better understanding of the relationship among ur- banization, economic growth and water use change is necessary for Chinese decision mak- ers at various levels to address the positive and negative effects of urbanization. Thus, we established a complete decomposition model to quantify the driving effects of urbanization on economic growth and water use change for China and its 31 provincial administrative regions during the period of 1997-2011. The results show that, （1） China＇s urbanization only contrib- uted about 30% of the economic growth. Therefore, such idea as urbanization is the major driving force of economic growth may be weakened. （2） China＇s urbanization increased 2352×10^8 m3 of water use by increasing the economic aggregate. However, it decreased 4530×10^8 m3 of water use by optimizing the industrial structure and improving the water use efficiency. Therefore, such idea as urbanization is the major driving force of water demand growth may be reacquainted. （3） Urbanization usually made greater contribution to economic and water use growth in the provincial administrative regions in east and central China, which had larger population and economic aggregate and stepped into the accelerating period of urbanization. However, it also made greater contribution to industrial structure optimization and water use efficiency improvement, and then largely decreased total water use. In total, urbanization had negative effects on water use growth in most provincial administrative re- gions in China, and the spatiotemporal differences among them were lessened on the whole. （4） Though urbanization helps to decrease water use for China and most provincial adminis- trative regions, it may cause water crisis in urban built-up areas or urban agglomerations. Therefore,

关键词： urbanization economic growth water demand complete decomposition model spatiotemporal dif-ference water resources compensation