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Water Losses in Arid and Semi-Arid Zone:Evaporation, Evapotranspiration and Seepage

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Journal of Mountain Science 2012年第2期9卷 256-261页

作者： MUPENZI Jean de la Paix LI Lanhai GE Jiwen NGAMIJE Jean ACHAL Verenyam habiyaremye gabriel HABUMUGISHA Jean de Dieu State Key laboratory of Desert and Oasis Ecology Xinfiang Institute of Ecologg and Geography Chinese Academy of Sciences 818 Beijing road south Urumqi Xinjiang 830011 China China University ofGeosciences （Wuhan） 388 Lumo Road Wuhan 430074 Hubei China Independent Institute of Lay Adventists ofKigali （INILAK） P O Box 6392 Kigali-Rwanda Institut Polytechnique de Byumba （IPB） PO Box 25 Byumba Rwanda

The primary purpose of this study was to assess water losses by evapotranspiration, evaporation and seepage in arid ***, evaporation and seepage are the main causes of water *** modeling water losses,a combination of Genetic Programming(GP),Penman-Monteith(PM) and Penman combination model for measurement of evapotranspiration,evaporation and seepage has been *** results were found to be varying depending on how the evaporation and seepage phenomena are *** results show that that there is an improvement in reducing evapotranspiration,evaporation and seepage losses in arid and semi-arid region.

关键词：半干旱区水损失渗漏水蒸散量蒸发 Penman 半干旱地区水量损失

Assessment of soil degradation and chemical compositions in Rwandan tea-growing areas

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Geoscience Frontiers 2011年第4期2卷 599-607页

作者： Jean de la Paix Mupenzi Lanhai Li Jiwen Ge Achal Varenyam gabriel habiyaremye Nzayisenga Theoneste Kamanzi Emmanuel xinjiang Institute of Ecology and Geography Chinese Academy of Sciences State Key Laboratory of Oasis Ecology and Desert Environment 818 Beijing South Road Urumqi Xinjiang 830011 China School of Environmental Studies China University of Geosciences 388 Lumo Road Hongshan Administrative District Wuhan Hubei 430074 China Hubei Key Laboratory of Wetland Evolution ＆ Eco-Restoration 388 Lumo Road Hongshan Administrative District Wuhan Hubei 430074 China

This study has focused on the processes of soil degradation and chemical element concentration in tea-growing regions of Rwanda,*** degradation accelerated by erosion is caused not only by topography but also by human *** soil degradation involves both the physical loss and reduction in the amount of topsoil associated with nutrient *** samples were collected from eleven tropical zones in Rwanda and from variable depth within each collecting *** these,Samples from three locations in each zone were analyzed in the laboratory,with the result that the pH of all soil samples is shown to be less than 5（pH〈5） with a general average of *** elements such as iron（Fe）, copper（Cu）,manganese（Mn）,and zinc（Zn） are present in high concentration *** contrast calcium （Ca） and sodium（Na） are present at low-level concentrations and carbon（C） was found in minimal *** addition,elements derived from fertilizers,such as nitrogen（N）,phosphorous（P）,and potassium（K） which is also from minerals such as feldspar,are also present in low-level concentrations. The results indicate that the soil in certain Rwandan tea plantations is acidic and that this level of pH may help explain,in addition to natural factors,the deficiency of some elements such as Ca,Mg,P and *** use of chemical fertilizers,land use system and the location of fields relative to household plots are also considered to help explain why tea plantation soils are typically degraded.

关键词： Chemical elements Fertilizer use pH Soil degradation Tea plantations

Climate Change Impacts in Rwanda:Challenges and Adaptations

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地学前缘 2009年第S1期16卷 93-93页

作者： habiyaremye gabriel Mupenzi Jean de la Paix Balogun Waheed Oyelola Institute of Ecology & Environmental Science China University of Geosciences(Wuhan) School of Environmental Studies China University of Geosciences(Wuhan)

Climate change is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is,in addition to natural climate variability,observed over a period of considerable *** shares with the world a big challenge of climate change,because climate change is not only an environmental issue,but also an economic issue,a social issue,a security issue and, above all,a moral *** paper reviews the origins of climate change and its impacts in Rwanda as they manifest themselves across various sectors

关键词： climate change Rwanda environmental protocols and laws

The Environmental Impact of Industrial Agriculture in Rwanda:The Case of Mulindi Tea Plantations

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地学前缘 2009年第S1期16卷 244-244页

作者： Mupenzi jean de la Paix habiyaremye gabriel Bazimenyera Jean de Dieu Institute of Ecology and Environmental Sciences School of Environmental StudiesChina University of Geosciences(Wuhan) Hubei Wetland Evolution & Ecological Restoration Key Laboratory

The aim of this study is to assess the impact of industrial agriculture on the environment in Rwanda taking Mulindi tea plantations as a case *** is one of the three major crops of Rwandan industrial agriculture apart from coffee and *** results of this study show clearly the impact of tea plantations on the environment in Rwandan in all *** samples collected in three zones

关键词： environment soil degradation deforestation tea water pollution Rwanda

Statistical Analysis of Climatic Data:Case of Temperature and Rainfall

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地学前缘 2009年第S1期16卷 122-122页

作者： gabriel habiyaremye Jiwen Ge Jean de la Paix Mupenzi Balogun Waheed Oyelola Jean de Dieu Bazimenyera Institute of Ecology and Environmental Sciences China University of Geosciences(Wuhan) Hubei Key Laboratory of Wetland Evolution & Ecological Restoration

Climate is a general weather condition in the air above the Earth such as wind,temperature,humidity, rain...especially at a particular time over a particular *** is said that there is interdependence between those *** order to check out this connectivity, a statistical analysis between rainfall and temperature was carried out by analyzing the correlation and linear regression as well as testing the

关键词： climate rainfall temperature