scholarly journals Analysis of the Rice Yield under an Agrivoltaic System: A Case Study in Japan

Environments ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 65
Author(s):  
Ruth Anne Gonocruz ◽  
Ren Nakamura ◽  
Kota Yoshino ◽  
Masaru Homma ◽  
Tetsuya Doi ◽  
...  
Keyword(s):  
Land Use ◽  
Solar Radiation ◽  
Rice Yield ◽  
Fertilizer Application ◽  
Agricultural Crops ◽  
Factors Affecting ◽  
Photovoltaic Panels ◽  
System A ◽  
Upper Limit

Agrivoltaic systems, comprising photovoltaic panels placed over agricultural crops, have recently gained increasing attention. Emerging interest in these systems led us to investigate their influence on rice crops. Various factors affecting rice crop yield, including fertilizer application, temperature, and solar radiation, were directly observed, and measured to evaluate changes associated with the shading rates of photovoltaic systems installed above rice crops. The results suggest that the allowable upper limit of the shading rate for agrivoltaic installations ranges from 27 to 39%, which sustains at least 80% of the rice yield, a condition set by the Japanese Ministry of Agriculture, Forestry and Fisheries for these systems. If such systems are applied to rice paddies in Japan at 28% density, they could generate 284 million MWh/yr. This is equivalent to approximately 29% of the total Japanese electricity demand, based on 2018 calculations. This projection indicates the potential of agrivoltaic systems for efficient land use and sustainable energy generation.

Management and environmental constraints to rice yield within a village irrigation system ? A case study from Sri Lanka

GeoJournal ◽  
1988 ◽  
Vol 17 (3) ◽  
Author(s):  
E. Dal�us ◽  
O. Palm ◽  
K. Sandell ◽  
S.N. Jayawardena ◽  
G.D. Siripala
Keyword(s):  
Sri Lanka ◽  
Rice Yield ◽  
Irrigation System ◽  
Environmental Constraints ◽  
System A

scholarly journals The factors affecting the institutionalisation of two policy units in Burkina Faso’s health system: a case study

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Andre Zida ◽  
John N. Lavis ◽  
Nelson K. Sewankambo ◽  
Bocar Kouyate ◽  
Kaelan Moat
Keyword(s):  
Health System ◽  
Factors Affecting ◽  
System A

scholarly journals Can climate help fighting COVID-19 trauma? A case study of Maricopa County, Arizona, USA

2021 ◽  
pp. 105-116
Keyword(s):  
Linear Regression ◽  
Solar Radiation ◽  
The Other ◽  
Climatic Parameters ◽  
Factors Affecting ◽  
Regression Test ◽  
Spearman Correlation Test ◽  
Maximum Minimum

Introduction: Since the emergence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus, the disease has spread rapidly throughout the world and became a traumatic stressor. Identification of the factors affecting the spread of the disease makes it possible to prevent its further propagation and save more people in similar situations. Environmental and climatic parameters are among the factors affecting the prevalence of diseases. Determination of environmental effects on Coronavirus disease (COVID-19) prevalence can help develop policies to suppress the spread. Methods: This study investigated the effect of climatic parameters on the spread of COVID-19 disease in County Maricopa from March 11, 2020, to November 30, 2020. These parameters include maximum, minimum, and mean daily temperature as well as maximum, minimum, and mean daily humidity, wind speed, solar radiation, and Air Quality Index (AQI) of particulate matter10 (PM10), PM2.5, and O3. A Shapiro-Wilk test was used to evaluate the normality of variables and the Spearman correlation test was used to determine the correlation between parameters and daily COVID-19 cases. A simple linear regression was applied on parameters that had significant Spearman’sranked correlation with the daily COVID-19 cases to determine their contribution to the pandemic. Results: The present study showed that the maximum, minimum, and mean temperature parameters and PM10 and PM2.5 particles had a positive and significant correlation (P<0.01) with the prevalence of COVID-19 disease. The effect of PM10 particles was higher than the other parameters (0.488, P<0.01). The parameters of maximum, minimum, and mean relative humidity along with solar radiation and O3 AQI had a significant and negative correlation with the development of COVID-19 disease (P<0.01). The effect of maximum humidity was higher than that of the other parameters (-0.364, P<0.01). A linear regression test showed that O3 (β=-15.16, P<0.001) and Tmean (β=18.47, P<0.01) significantly predicted daily COVID-19 cases. Conclusion: It can be concluded that climatic parameters can affect the COVID-19 pandemic and should be addressed.

scholarly journals Assessing residential building values in Spain for risk analyses – application to the landslide hazard in the Autonomous Community of Valencia

2014 ◽  
Vol 14 (11) ◽  
pp. 3015-3030 ◽  
Author(s):  
I. Cantarino ◽  
F. J. Torrijo ◽  
S. Palencia ◽  
E. Gielen
Keyword(s):  
Land Use ◽  
Residential Buildings ◽  
Residential Building ◽  
Landslide Hazard ◽  
Hazard Map ◽  
Autonomous Community ◽  
System A ◽  
Exposure Variable ◽  
Land Use And Cover

Abstract. This paper proposes a method of valuing the stock of residential buildings in Spain as the first step in assessing possible damage caused to them by natural hazards. For the purposes of the study we had access to the SIOSE (the Spanish Land Use and Cover Information System), a high-resolution land-use model, as well as to a report on the financial valuations of this type of building throughout Spain. Using dasymetric disaggregation processes and GIS techniques we developed a geolocalized method of obtaining this information, which was the exposure variable in the general risk assessment formula. Then, with the application over a hazard map, the risk value can be easily obtained. An example of its application is given in a case study that assesses the risk of a landslide in the entire 23 200 km2 of the Valencia Autonomous Community (NUT2), the results of which are analysed by municipal areas (LAU2) for the years 2005 and 2009.

The impacts of environmental and socioeconomic factors on the non-point source pollution in a small watershed in the Three Gorges Reservoir Area, China

2021 ◽  
Author(s):  
Jun Deng ◽  
Zhaoxia Li
Keyword(s):  
Land Use ◽  
Socioeconomic Factors ◽  
Fertilizer Application ◽  
Dry Season ◽  
Wet Season ◽  
Topographic Wetness Index ◽  
Wetness Index ◽  
Factors Affecting ◽  
Nps Pollution ◽  
Per Capita

&lt;p&gt;Determining the impacts of environmental and socioeconomic factors on nitrogen (N) and phosphorus (P) loss in the watershed is critical to reducing non-point source (NPS) pollution. This paper, we set 13 sampling points in the main stream and tributaries of watershed and sampled every two weeks from 2018 to 2020 to monitor the total nitrogen (TN) and total phosphorus (TP) concentration in the waterbodies. Twenty-six potential influencing factors affecting the nitrogen and phosphorus loss in the watershed were selected. The partial least squares regression (PLSR) was used to determine the relationship between TN and TP concentrations in the watershed and the 26 selected potential influencing factors. The results showed that the mean TN concentrations and mean TP concentrations in the dry season (11.42 mg&amp;#183;L&lt;sup&gt;&amp;#8722;1&lt;/sup&gt; and 0.09 mg&amp;#183;L&lt;sup&gt;&amp;#8722;1&lt;/sup&gt;, respectively) were both less than those in the wet season (13.20 mg&amp;#183;L&amp;#8722;1 and 0.11mg&amp;#183;L&amp;#8722;1, respectively). The optimal PLSR model explained 69.6%, 73.1% and 66.1% of the TN concentration variability, and 65.7%, 79.5% and 67.4% of the TP concentration variability during annual, dry season and wet season, respectively. According to the importance of the variables in the predicted value (VIP), topographic wetness index (TWI), planting structure (PS), interspersion and juxtaposition index (IJI), Orchard land use (OP), nitrogen fertilizer application (NF), per capita income (INCOME) and catchment area (AREA) were the key factors affecting TN concentration, whereas topographic wetness index (TWI), interspersion and juxtaposition index (IJI), population density (POP), slope gradient (SLOPE) and hypsometric integral (HI) were the key controlling factors of TP concentration. In addition, TN concentration was affected by cropland land use (CP) during the dry season and proportion of labor (LABOR) and per capita agricultural land area (ALA) during the wet season. TP concentration was affected by mean patch size (AREA_MN), phosphate fertilizer application (PF) and patch density (PD) during the dry season and residential area (RP) and values during the wet season. This study illustrates the impact of environmental and socioeconomic factors on NPS pollution, and can be used as a guide for effective NPS pollution control and water quality management.&lt;/p&gt;

Archaeological GIS for Land Use in South Etruria Urban Revolution in IX-VIII Centuries B.C.

2018 ◽  
pp. 3419-3433
Author(s):  
Giuliano Pelfer
Keyword(s):  
Land Use ◽  
Resource Allocation ◽  
Mediterranean Area ◽  
Market Area ◽  
Market Demand ◽  
Subsistence Economy ◽  
Factors Affecting ◽  
Ancient Agriculture ◽  
Selection Of

A GIS is developed for analysis of formation, growth and collapse of past societies. The Urban Revolution in Mediterranean area between IX-VIII centuries B.C. pushed by development of Mediterranean market area, is a good case study. The process leads to the growth of urban centres and of population. In Ancient Etruria the changes produced the abandonment of tens of older sites and the origin of protourban centres on hill plateaux. The GIS is developed for explaining the factors affecting the urbanization process in Tarquinia. Settlement strategy was linked to available resources in the territory. The research focused on land use for ancient agriculture, by reconstructing features of land use. The results show that the selection of plateaux allowed a better resources management, required by population growth as well by the Mediterranean market demand. The changes explain the transition from a subsistence economy to a production of agrarian surplus in cereals. A new organization based on the private household property of agrarian plots could satisfy a better resource allocation.

scholarly journals Examining the Land Use Act of 1978 and Its Effects on Tenure Security in Nigeria: A Case Study of Ekiti State, Nigeria

2019 ◽  
Vol 22 ◽  
pp. 1-34
Author(s):  
Kehinde Hassan Babalola ◽  
Simon Antony Hull
Keyword(s):  
Land Use ◽  
Rural Areas ◽  
Urban Areas ◽  
Single Case ◽  
Rural Poor ◽  
Tenure Security ◽  
Land Registration ◽  
System A ◽  
Ownership Of Land

The Land Use Act of 1978 (LUA) has failed to achieve some of its objectives. The rural poor and the vulnerable are those most affected. The failure is ascribed to problems inherent in the Act and poor implementation. This paper discusses the effect of the LUA on the customary ownership of land and its effect on the tenure security of the rural poor. Using a conceptual framework for guiding cadastral systems development, the critical areas of the LUA as pertains to tenure security are analysed for the degree of their success, sustainability, and significance. The framework looks at the underlying theory, the drivers of change, the change process, and the land administration system. A mixed methodology approach was adopted for the study, using a single case study. Three groups of respondents contributed to the study: land professionals, civil servants and students. The study found that securing title to land is difficult, compensation provisions need to be reviewed, formal land registration is not in the interest of the poor, land is not available at an affordable rate, land speculators are still active in Nigerian land markets, the composition of the two committees is inadequate, and the refusal to grant certificates to people below the age of 21 is age biased. It further revealed that the power granted to the governor is enormous and unnecessary. The findings showed that the LUA is both effective in some areas and dysfunctional in others. This is because of the age of the Act and the lack of a pro-poor policy focus. Based on these findings recommendations were made, including that a new policy be enacted that includes pro-poor policies and customary laws. The LUA is found to be useful in urban areas, but not in solving land-related problems in rural areas. This study provides an understanding of the legal holding of land in Nigeria.

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