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Prospects of eco-hydrological model for sponge city construction

Ecosystem Health and Sustainability 2021年第1期7卷 398-415页

作者： Chuhan Feng Na Zhang telesphore habiyakare Yuna Yan Han Zhang College of Resources and Environment University of Chinese Academy of SciencesBeijingChina Yanshan Earth Critical Zone and Surface Fluxes Research Station University of Chinese Academy of SciencesBeijingChina

Introduction:Understanding complex urban eco-hydrological processes through models is an important approach in sponge city ***,the research on this has not kept pace with the urgent need for sustainable development of urban water resources,which makes the current construction efficiencies ***:This review highlights the importance of establishing a multi-scale urban distributed eco-hydrological model by analyzing the connotations of sponge city *** models that can be configured for sponge city construction were *** models have limitations in coupling ecological and hydrological processes,multi-scale and landscape-based simulations,refined simulations,and computational *** contrast,cellular automaton has a discrete data structure in space,time,and states,is capable of bottom-up computing,and provides a new conceptual framework for simulating complex urban eco-hydrological *** and Conclusion:Future model development may focus on the conduction of multi-scale simulation systems,the simulation of coupled urban eco-hydrological processes,the quantification of eco-hydrological responses to land cover composition,spatial configuration and low impact development practices,and improving simulation accuracy.

关键词： Urban eco-hydrological process cellular automaton multi-scale simulation land cover composition spatial configuration refined simulation

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Temporal changes in seasonal precipitation over the Sahara Desert from 1979 to 2016

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Research in Cold and Arid Regions 2021年第3期13卷 220-233页

作者： Sindikubwabo Celestin Feng Qi RuoLin Li WenJu Cheng Jian Ma habiyakare telesphore Nzabarinda Vincent Key Laboratory of Eco-hydrology of Inland River Basin Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China Qilian Mountains Eco environment Research Center LanzhouGansu 730000China Academy of Water Resources Conservation Forests in Qilian Mountains ZhangyeGansu 734000China

Rainfall variability dominates livelihoods in all countries of Saharan *** better understand the processes involved in Sahara precipitation changes,we used the Global Precipitation Climatology Center(GPCC)dataset to examine dry and wet seasonal trends in the Sahara region from 1979 to *** also used the European Centre for Medium-Range Weather Forecasts(ECMWF)to evaluate the general atmospheric circulation associated with seasonal change of Sahara *** Mann-Kendall test and Theil sens'slope estimator methods were adopted to test and estimate the significance and weight of precipitation trend,*** results revealed that Sahara precipitation has increased *** seasonal evaluation shows a positive trend of 0.42 mm/decade and 1.43 mm/decade in JAS(June,August,and September)seasons for the northern and southern Saharan Desert,***,the JFMA(January,February,March,and April)period shows a negative trend but not statistically *** examination of the general circulation and moisture transport changes suggested an increase of rainfall in southern *** wet period is also driven by northward penetration of moisture originating from the Sahel region,African Easterly Jet(AEJ),and weakening in the upper tropospheric zonal *** rainfall has also been likely associated with positive anomalies of sea surface temperature(SST)in the North Tropical Atlantic(NTA)and the Mediterranean Sea.

关键词： Sahara precipitation variability arid Africa climate

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Water Resources Conflict Management of Nyabarongo River and Kagera River Watershed in Africa

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Journal of Water Resource and Protection 2015年第12期7卷 889-896页

作者： telesphore habiyakare Nianqing Zhou Department of Hydraulic Engineering Tongji University Shanghai China College of Science and Technology University of Rwanda Kigali Rwanda

In the process of exploiting and using water resources of river basin, the benefit conflict problems among upper and lower river districts and among different departments restrict to sustainable exploiting and using water resources of river basin. In this paper, the water resources conflict management of Nyabarongo River and Kagera River watershed is studied. The Nyabarongo is a major river in Rwanda, begins in Nyungwe Forest, and flows up to the north-western part of the country, then down through the center to the south-east, eventually forming the main tributary of the Kagera River watershed, the main affluent of Lake Victoria, which drains into the Nile River. The basin is shared among 11 riparian states. This trans-boundary character of the Nile presents a great challenge of water conflicts;national interests have historically been promoted at the expense of regional interests. The framework of this paper is as follows: the water resources bulletin is firstly described, and then the cooperation and regional conflicts are discussed;finally a sustainable framework for governing the water resources is proposed to meet water management in riparian states.

关键词： Water Management Water Conflicts Nile River Kagera Watershed

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Advances in Quantifying Impact and Extent of Water-Land-Food Nexus for Food Security in Africa

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Agricultural Sciences 2022年第4期13卷 520-541页

作者： Auguste Cesar Itangishaka Yonghui Yang Kiril Manevski Huilong Li telesphore habiyakare Gratien Twagirayezu Jean Yves Uwamungu Christine Mushimiyimana Romaine Ingabire Hubert Hirwa Vincent Nzabarinda Key Laboratory of Agricultural Water Resources Hebei Laboratory of Agricultural Water-Saving Center for Agricultural Resources Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Shijiazhuang China University of Chinese Academy of Sciences Beijing China Department of Agroecology Aarhus University Tjele Denmark Sino-Danish Center for Education and Research Beijing China College of Resources and Environment Chinese Academy of Sciences Beijing China School of Environmental and Municipal Engineering Lanzhou Jiaotong University Lanzhou China Tianshui Normal University Tianshui China College of Bioengineering and Technology Tianshui Normal University Tianshui China Gansu Provincial Key Laboratory of Resource Utilization of Agricultural Solid Waste Tianshui Normal University Tianshui China China-Belarus Institute of Ecology and Environment Tianshui Normal University Tianshui China Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi China

Food systems have the potential to promote human health and enhance environmental sustainability;yet most African countries have decadal starvation and malnourishment due to unstable food systems lacking basic nutritional profiles. To understand the key questions of the African food production and food security crisis, it is important to evaluate the past and the present balance of food production and consumption quantitatively and comprehensively and identify resource constraints. This continental study analyzed water-land-food (WLF) nexus in recent decades (1997-2017) and accessed whether these resources cope with different population growth projections, dietary changes and agricultural water management. The findings revealed that in 2017, total production in Africa for the four major crops was 83.3, 34.1, 21.0 and 26.7 million tons for, respectively, maize, rice, sorghum and wheat. Together with the imported food, 38 countries experienced an increase in kcal by food supply, while 7 countries encountered a decrease. However, only 6 countries were above the 1500 kcal∙capita−1∙day−1—the global average food consumption from the four major crops. The study also found that in the context of food production and out of the total African population, 268 million (21.6%) have enough land and water, 310 million (25.0%) is without enough land and water, further 279 million (22.5%) have enough water but not enough land, and 381 million (30.8%) encounter enough land but not enough water. This is the first WLF nexus study for the African continent and emphasizes the need for efficient and rapid changes in the food systems of the African population, both in production and consumption, in order to provide sustainable and secure food systems, and ultimately approach the first three Sustainable Development Goals.

关键词： Basic Dietary Requirements Cereal Import Dependency Ration Constraint Import Production Shortages Resource

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