The primary purpose of this study was to assess water losses by evapotranspiration, evaporation and seepage in arid zone.Normally, evaporation and seepage are the main causes of water losses.For modeling water losses,...The primary purpose of this study was to assess water losses by evapotranspiration, evaporation and seepage in arid zone.Normally, evaporation and seepage are the main causes of water losses.For 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 developed.The results were found to be varying depending on how the evaporation and seepage phenomena are modeled.These results show that that there is an improvement in reducing evapotranspiration,evaporation and seepage losses in arid and semi-arid region.展开更多
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 study.Tea is one of the three major crops of Rwandan industrial agriculture...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 study.Tea is one of the three major crops of Rwandan industrial agriculture apart from coffee and pyrethrum.The results of this study show clearly the impact of tea plantations on the environment in Rwandan in all aspects.Soil samples collected in three zones展开更多
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...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 length.Rwanda 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 issue.This paper reviews the origins of climate change and its impacts in Rwanda as they manifest themselves across various sectors展开更多
基金funded by the State Key Development Program for Basic Research of China(973 program,Grant No.2010CB951002)National Natural Science Funds of China(Grant No.40972218)+1 种基金the Natural Sciences Foundation ofChina(Grant No.40871027)the Knowledge Innovation project of Chinese Academy of science(Grant No.KZCX2–YW–334)
文摘The primary purpose of this study was to assess water losses by evapotranspiration, evaporation and seepage in arid zone.Normally, evaporation and seepage are the main causes of water losses.For 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 developed.The results were found to be varying depending on how the evaporation and seepage phenomena are modeled.These results show that that there is an improvement in reducing evapotranspiration,evaporation and seepage losses in arid and semi-arid region.
文摘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 study.Tea is one of the three major crops of Rwandan industrial agriculture apart from coffee and pyrethrum.The results of this study show clearly the impact of tea plantations on the environment in Rwandan in all aspects.Soil samples collected in three zones
文摘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 length.Rwanda 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 issue.This paper reviews the origins of climate change and its impacts in Rwanda as they manifest themselves across various sectors
