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Constructing a 30m African Cropland Layer for 2016 by Integrating Multiple Remote sensing,crowdsourced,and Auxiliary Datasets

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Big Earth Data 2022年第1期6卷 54-76页

作者： Mohsen Nabil Miao Zhang Bingfang Wu Jose Bofana Abdelrazek Elnashar State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of Sciences(AIRCAS)BeijingChina College of Resources and Environment University of Chinese Academy of Sciences(UCAS)BeijingChina Division of agriculture Applications Soilsand Marine(AASMD)National Authority for Remote Sensing&Space Sciences(NARSS)CairoEgypt faculty of Agricultural Sciences Catholic University of MozambiqueCuambaMozambique Department of Natural Resources Faculty of African Postgraduate StudiesCairo UniversityGizaEgypt

Despite its essential importance to various spatial agriculture and environmental applications,the information on actual cropland area and its geographical distribution remain highly uncertain over Africa among remote-sensing *** of the African regions has its unique physical and environmental limiting factors to accurate cropland mapping,which leads to high spatial discre-pancies among remote sensing cropland *** no dataset could cope with all limitations,multiple datasets initially derived from various remote sensing sensors and classification techniques must be integrated into a more accurate cropland product than individual ***,in the current study,four cropland products,produced initially from multiple sensors(***-8 OLI,Sentinel-2 MSI,and PROBA-V)to cover the period(2015-2017),were integrated based on their cropland mapping accuracy to build a more accurate cropland *** four cropland layers’accuracy was assessed at Agro-ecological zones units via an inten-sive reference dataset(17,592 samples).The most accurate crop-land layer was then identified for each zone to construct the final cropland mask at 30 m resolution for the nominal year of 2016 over *** a result,the new layer was produced in higher cropland mapping accuracy(overall accuracy=91.64%and cropland’s F-score=0.75).The layer mapped the African cropland area as 282 Mha(9.38%of the Continent area).Compared to earlier crop-land synergy layers,the constructed cropland mask showed a considerable improvement in its spatial resolution(30 m instead of 250 m),mapping quality,and closeness to official statistics(R^(2)=0.853 and RMSE=2.85 Mha).The final layer can be down-loaded as described under the“Data Availability Statement”section.

关键词： Cropland mapping synergy mapping land cover accuracy assessment multisource data fusion

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Market Dynamics in Maize Production in the North Region of Mozambique

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Journal of Agricultural Science and Technology(B) 2022年第2期12卷 55-61页

作者： Sónia Maria Olímpio Oscar de Araújo Ibraimo Teleha Chabite District Services of Economic Activities Meconta Provincial Services of Economic ActivitiesNampula 36Mozambique faculty of agriculture of cuamba Catholic University of MozambiqueNiassa 22Mozambique Laboratory of Quality and Food Safety(LQSA) Lúrio Interdisciplinary Study Center(CEIL)Lúrio UniversityStreet No.4250Nampula 364Mozambique

In this article,a radiography of the agricultural sector is presented,specifically in the production of maize in the district of Malema,considering that the product is one of the most produced and consumed crops by the population in the province of *** agriculture productivity is attributed to inadequate access to production technology and inputs and to“weak”markets for agricultural products,due to poor infrastructure and inadequate access of agricultural producers to financial services(example credit).In general,several documents analyze on how small-scale agriculture has lacks of conditions,and factors necessary for high productivity and *** contrast,there is little information that gives an idea of the situation of agricultural maize production and existing agricultural markets and how this production and these markets are changing in Mozambique *** is,for example,a complete absence of references to large-scale investments in agriculture currently agreed with domestic and foreign trading *** to this omission,the author presents a partial analysis of the current context,and,therefore,it is not well explained how the greater investment can be directed to obtain greater use of productive technology and better access to the market,among small-scale *** seeks to analyze in more detail the situation“diagnosis”that is intended to be made on agriculture,specifically in the maize crop,and as a way to identify the specific aspects that can be considered starting points to work in the government intervention,in order to achieve the goals and increase agricultural productivity.

关键词： Maize production system family sector Mozambique

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A Review on Renewable Energy Systems for Irrigation in Arid and Semi-Arid Regions

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Journal of Power and Energy Engineering 2019年第10期7卷 21-58页

作者： Doroteia Hipoldina dos Santos Isaías Boaventura Chongo cuamba António José Leao faculty of Sciences Eduardo Mondlane UniversityMaputoMozambique Energy Research Center Eduardo Mondlane UniversityMaputoMozambique

The lack of water in arid and semi-arid regions has often limited agricultural production. Indeed, even where water is available for irrigation, the lack of electricity, as well as the high costs of diesel, has created constraints on small farmers. The purpose of this research is to review the renewable energy potential available in arid and semi-arid zones that can be used for irrigation as a substitute for fossil fuels. In this review, the solar thermal irrigation, solar photovoltaic (PV) irrigation, wind pumping and biomass pumping are discussed. The comparison of different hybrid pumping systems and analyses of renewable sources irrigation assessment in arid and semi-arid regions of Mozambique also are discussed. The results of this study showed that there are still certain technological limitations regarding the use of solar thermal energy for irrigation. As far as wind power is concerned, the analysis of the pumping water life cycle cost showed that the wind power water pumping system is more economical and viable compared to the diesel based system. However, the study concluded that photovoltaic solar energy has been shown to be more viable for pumping water for irrigation in arid and semi-arid regions.

关键词： Renewable Energy Systems Water Pumping Irrigation Arid and Semi-Arid Regions

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