The Experts below are selected from a list of 14007 Experts worldwide ranked by ideXlab platform
Li Qiao-zheng - One of the best experts on this subject based on the ideXlab platform.
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Research on Drought-Resisting Technology of Evaporation-Inhibiting and Rain Water Harvesting for Spring Wheat in Dingxi Semiarid Region
Agricultural Meteorology, 2002Co-Authors: Li Qiao-zhengAbstract:The effect of application of chemical method combined with physical method on spring wheat was analyzed by using farmland experiments in 1997～2000. The chemical method was application of Agrometeorology No.3,Fa"Handilong" and water-holding substance mixed with seeds; the physical method was plastic film mulching and field micro-rain water harvesting. The result showed that rain water harvesting by farmland combined with drought-resisting substance obtained a best yield-increasing effect in Dingxi Semiarid Region and it changed little every year even if in the drought year. So it is the best drought-resisting technology of evaporation-inhibiting and rain water harvesting in Dingxi Semiarid Region. By using this technology, spring wheat seedling emerged 4 days earlier and the rate of seedling emergence increased by 17%～18%,yield increased by 17.6%～72.8%, water use efficiency increased by 3.05kg·mm -1·hm -2, reached 39.1%.
Enio Bueno Pereira - One of the best experts on this subject based on the ideXlab platform.
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Case study for hybrid power generation combining hydro- and photovoltaic energy resources in the Brazilian Semiarid Region
Clean Technologies and Environmental Policy, 2019Co-Authors: Maria Francisca Azeredo Velloso, Fernando Ramos Martins, Enio Bueno PereiraAbstract:Hydropower is currently the primary energy resource to service the Brazilian electricity sector. However, the dry seasons in the Brazilian Semiarid Region have become longer due to climate variability, and they have affected the operation of hydropower plants during the last decade. Brazil has a growing energy demand, and energy mix diversification is essential to meet the power capacity required to support sustainable development. Investments in photovoltaic power plants are already a robust strategy to foster a new cycle of socioeconomic development based on a low-carbon economy. Hybrid power generation using hydro- and solar energy resources can be an alternative source due to the seasonal complementarity between them in the Brazilian Semiarid Region. During the dry periods, the photovoltaic power plant can replace hydropower generation. The present study aimed to evaluate the contribution of a solar photovoltaic plant to increase power generation in the Sobradinho hydropower plant operating in the São Francisco River, the most important water resource in the Brazilian Semiarid Region. The results showed that the PV power plant contributes to saving water for other multiple usages and avoids emissions of greenhouse gases by thermal power plants in long periods of intense drought. According to the simulation results for the 2013–2015 period, the PV plant would add around 8350 GWh to the actual power generated in Sobradinho using an area smaller than 0.5% of its water reservoir surface. In addition, hybrid power generation would avoid emissions around 27.106 t CO2 released into the atmosphere by thermal power plants using fossil fuels during 3 years.Graphical abstract
Salvador Carlos Hernandez - One of the best experts on this subject based on the ideXlab platform.
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Potential Uses of Treated Municipal Wastewater in a Semiarid Region of Mexico
Sustainability, 2019Co-Authors: Alfredo Valdes Ramos, Elsa N. Aguilera Gonzalez, Gloria Tobón Echeverri, Luis Samaniego Moreno, Lourdes Diaz Jimenez, Salvador Carlos HernandezAbstract:This paper presents an assessment of three potential applications of municipal treated wastewater in a Semiarid Region of northern Mexico. The potential applications considered are agriculture, industry, and watering urban green areas. The results indicate that in the best scenario, the maximal application of treated wastewater is 150 L/s for industrial activities. Besides industrial applications, this scenario would allow farmers and urban green areas to receive 980 L/s and 70 L/s of treated wastewater respectively. Other issues and alternatives are also identified. With the implementation of this scenario, it is possible to improve the environmental, and even the socioeconomic conditions, of the study Region.
Emilio Lèbre La Rovere - One of the best experts on this subject based on the ideXlab platform.
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The Traditional Technological Approach and Social Technologies in the Brazilian Semiarid Region
Sustainability, 2017Co-Authors: Letícia Machado, Emilio Lèbre La RovereAbstract:There are different technological approaches to deal with the social-ecological adversities found in the Brazilian Semiarid Region (BSA). They vary according to the interpretation of what the roots of these adversities and the causes of the resulting vulnerability are. This paper analyses two technological approaches to the BSA, the first provided by the government through public policies and the other driven by civil society. It focuses on the initiatives promoted by each approach during the 20th and 21st centuries, and discusses how they have enhanced or reduced the sustainability of the Brazilian Semiarid Region. This assessment is based on document analysis, fieldwork and open/semi-structured interviews. The traditional technological approach did not reduce the social-ecological vulnerability of the BSA system or increase resilience of family farmers and of the deciduous forest, the most vulnerable parties. It has boosted development from a classical development perspective, promoting macro-infrastructure and growth, but also contributed to keep the same pattern of dependence of farmers. Social technologies have been promoting the BSA sustainability and can have a long-lasting impact if extensively applied. While the traditional approach mostly benefits large landowners, social technologies benefit family farmers, the deciduous forest and the entire social-ecological system.
Chen Ming - One of the best experts on this subject based on the ideXlab platform.
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Study on moisture characteristics of marine saline soil irrigated with seawater in Semiarid Region
Journal of Nanjing Agricultural University, 2003Co-Authors: Chen MingAbstract:The field experiments of irrigation with seawater mixed with fresh water were carried out in Laizhou,Shandong Province The results showed that high proportion of seawater irrigated had a function of water conservation in arid and Semiarid Region Characteristics of the soil moisture irrigated with seawater were as follows: (1)In Semiarid Region,the soil moisture content in 050 cm soil layer was affected mainly by irrigation,rainfall and evaporation etc But this effect became smaller with the depth of soil As the proportion of seawater increasing,soil water suction in 050 cm soil profile became lower while soil moisture content increased gradually,and the capacity of water conservation increased 40%60% or so (2)The soil water suction in different soil layers changed significantly with the proportions of seawater The soil water suction in 5,15 and 50 cm soil layer of different treatment was in following order: A,B,C,D,except in 30 cm soil layer,B got the highest water suction (3)All of the soil water suction decreased to the smallest in 68 hours after irrigation The soil water suction in the 515 cm of soil layer produced high increase in 7080 hours after irrigation The soil water suction in 5 cm soil layer of the treatments of A and B differed evidently from C and D in 48 hours after irrigation As the time prolonged,the difference became larger This case was also found in 15 cm of soil layer in 60 hours after irrigation The soil water suction in every treatment of 30 cm soil layer was almost identical
