scholarly journals Landslide Process Revealed by Mineralogical Properties of Landslide Deposits in the Sa Pa District, Vietnam

2021 ◽  
Vol 16 (4) ◽  
pp. 556-560
Author(s):  
Takanari Yamasaki ◽  
Go Sato ◽  
Takashi Kimura ◽  
Hoang Viet Hung ◽  
Nguyen Duc Manh ◽  
...  
Keyword(s):  
Debris Flow ◽  
Mineral Composition ◽  
Paddy Fields ◽  
Composition Analysis ◽  
Gentle Slope ◽  
Northern Vietnam ◽  
Mineralogical Properties ◽  
Landslide Process ◽  
The Village ◽  
Upper Slope

Hau Thao Village is located in Sa Pa Prefecture, in northern Vietnam. The village contains one of the most picturesque landscapes with terraced paddy fields located in landslide topography formed on a gentle slope. However, the creation of the topography has not been sufficiently clarified. In this study, samples of soil and stone are taken from two landslide areas in Hau Thao Village for mineral composition analysis, clarifying that the sauce rock of the deposits comprising the landslide areas is made up of granitoids, forming the upper slope above the fault located in the hinterland. The landslides occurring in Hau Thao Village are caused by the remobilization of the secondary deposits transported from the upper part of the slope by debris flow.

Research on Process Mineralogy of Potassium-Rich Shale

2010 ◽  
Vol 158 ◽  
pp. 197-203 ◽  
Author(s):  
Jie Liu ◽  
Yue Xin Han ◽  
Wan Zhong Yin
Keyword(s):  
Chemical Composition ◽  
Mineral Composition ◽  
Potassium Feldspar ◽  
Composition Analysis ◽  
Research Results ◽  
Dsc Analyses ◽  
Process Mineralogy ◽  
Mineral Compositions ◽  
Chemical Composition Analysis

The process mineralogy of potassium-rich shale from Chaoyang of Liaoning, China, was studied. Research results showed there are much less variety and smaller quantities in mineral compositions. Calculated mineral composition by means of chemical composition analysis combined with XRD, MLA, IR and TG-DSC analyses showed that main minerals with were Potassium-feldspar, muscovite, biotite and illite, and gangue minerals were quartz and small amounts of hematite. Potassium-rich minerals such as potassium-feldspar and muscovite contact smoothly with quartz respectively, and there was the direction arrangement among potassium-feldspar, quartz and muscovite in the shale. And quartz and hematite were main cement in the shale. The influences of the research results on the potassium extraction from potassium-rich shale were distinct.

scholarly journals Magnetic Signatures on River Sediments and Agricultural Soils as Proxy Indicators of Anthropogenic-derived Pollution (Case Study: Cikijing River, Rancaekek, West Java)

2021 ◽  
Vol 7 (3) ◽  
pp. 381
Author(s):  
Dini Fitriani ◽  
Widya Utami ◽  
Kartika Hajar Kirana ◽  
Eleonora Agustine ◽  
Siti Zulaikah
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Agricultural Soils ◽  
River Sediments ◽  
Paddy Fields ◽  
Composition Analysis ◽  
Magnetic Minerals ◽  
West Java ◽  
Anthropogenic Pollutants ◽  
Magnetic Signatures

A number of activities occur around the Cikijing River in Rancaekek area, West Java, such as industrial and domestic activities. The various activities could decrease the quality of the river and surrounding environment due to anthropogenic pollutants that might be produced. Since the Cikijing River is also used as the source of irrigation, paddy fields around the river could be also be affected. The presence of pollutants in river sediments and agricultural soils over a long period could change their magnetic properties. Magnetic susceptibility of Cikijing River sediments and soils of the paddy fields in the surrounding have been examined considering that magnetic properties could represent environmental conditions. The results show that river sediments have magnetic susceptibility (cLF) in range of 356.2-456.3 (×10-8) m3kg-1, whereas soils samples have cLF varying from 94.1 to 347.1 (×10-8) m3kg-1, suggesting domination of ferrimagnetic minerals. The cFD (%) is <4% indicating the anthropogenic origin of magnetic minerals.  Electron microscopy images show the imperfect octahedral and spherules shapes of magnetic grains that supports magnetic susceptibility analysis about the source of magnetic minerals. Elemental composition analysis reveals Fe and O’s content as main elements, including minor elements of Ca, Mg, Al. Si, Ti and Cr

scholarly journals Mineral Content and Antisickling Activity of Annona senegalensis, Alchornea cordifolia and Vigna unguiculata Used in the Management of Sickle Cell Disease in the Kwilu Province (Congo, DR)

2020 ◽  
pp. 18-27
Author(s):  
Jules M. Kitadi ◽  
Clément L. Inkoto ◽  
Emmanuel M. Lengbiye ◽  
Damien S. T. Tshibangu ◽  
Dorothée D. Tshilanda ◽  
...  
Keyword(s):  
Sickle Cell Disease ◽  
Mineral Composition ◽  
Sickle Cell ◽  
Mineral Elements ◽  
Spectrometric Method ◽  
Spectrometric Analysis ◽  
Composition Analysis ◽  
Cell Disease ◽  
Republic Of The Congo

Aims: To determine the mineral composition of some plants (Annona senegalensis Pers., Alchornea cordifolia (Schumach. & Thonn.) Müll. Arg. and Vigna unguiculate (L.) Walp.) used in the management of sickle cell disease by traditional practitioners in Kwilu province and to evaluate their antisickling activity in vitro.  Study Design: Plant collection in the Kwilu province, sample preparation,  antisickling tests and fluorescence spectrometric analysis. Place and Duration of Study: This work was performed at the Faculty of Science, University of Kinshasa, Congo DR, from October 2016 to January 2018. Methodology: These three plants were harvested in the province of Kwilu in Democratic Republic of the Congo. The mineral composition analysis was carried out using the fluorescence spectrometric method while the in vitro antisickling activity was evaluate using Emmel and hemolysis tests. Results: Twenty three mineral elements were identified in each of these three plants: Potassium (K), Phosphorus (P), Calcium (Ca), Sodium (Na), Magnesium (Mg), Sulphur (S), Chlorine (Cl) and trace elements as: Aluminum (Al), Silicon (Si), Vanadium (V), Chromium (Cr), Manganese (Mn), Iron (Fe), Nickel (Ni), Copper (Cu), Zinc (Zn), Selenium (Se), Brome (Br), Molybdenum (Mo), Tin (Sn), Iodine (I), Barium (Ba) and Lead (Pb). Annona senegalensis Pers., Alchornea cordifolia (Schumach. & Thonn.) Müll.Arg. and Vigna unguiculate (L.) Walp. aqueous extracts showed the capacity to prevent the sickling and the hemolysis of red blood cells. Conclusion: The obtained results confirm the antisickling activity thus justifying the use of these plants in Traditional Medicine for the management of sickle cell disease. The presence of some mineral elements like Fe, Zn, Mg and Se are useful for sickle cell disease patients.

Alternative approach for works controlling stony debris flows

2020 ◽  
Author(s):  
Carlo Gregoretti ◽  
Matteo Barbini ◽  
Martino Bernard ◽  
Mauro Boreggio
Keyword(s):  
Debris Flow ◽  
Debris Flows ◽  
High Elevation ◽  
Valley Bottom ◽  
Check Dams ◽  
Retention Basin ◽  
Retention Basins ◽  
Solid Liquid ◽  
The Impact ◽  
The Village

&lt;p&gt;Many sites of the Dolomites are threatened by channelized debris flows: solid-liquid surges initiated by the entrainment of large quantities of sediments into the abundant runoff at the head of channel incised on fans, can dramatically increase their volume along the downstream routing. This is the case of the Rovina di Cancia site where solid-liquid surges forming in the upper part of the basin can increase their volume up and over 50000 m&lt;sup&gt;3&lt;/sup&gt;, seriously impacting the downstream village of Borca di Cadore. The debris-flow channel ends just upstream the village that in the past was hit by four debris flows (three in the recent years) that caused victims and destructions. Control works built until now are not sufficient to protect the village from high magnitude debris flows and a definitive solution calls to be planned. Present works are a flat deposition area, 300 m downstream the initiation area, an open dam under construction downstream it, and &amp;#160;two retention basins at the end of the channel. Between the open dam and the upstream retention basin, there are the rest of eight check-dams made of gabions, built in the 60s and progressively damaged or destroyed by the debris flows occurred after their construction. This series of check-dams limited the entrainment of solid material and the occurrence of localized scours. The initial plan is the substitution of the check-dams with concrete structures and the widening of the dowsntream retention basin through the raising of high elevation embankment downstream it and the following demolition of the actual dyke. Finally, a channel crossing the village and national route on the valley bottom will deliver the fluid phase from the widened basin to the Boite river. All these control works have a very high cost for construction and maintenance and severely impact the village with the presence of a non-negligible residual risk. These drawbacks call for an alternative solution that is searched looking at to the morphology. Downstream of the open dam and on its right side, there is a deep impluvium that ends on a large grass sloping area. The novel solution requires the construction of a channel through the right high bank that deviates the debris flow into the impluvium. The impluvium, widened through the excavation of the surrounding slopes, is closed at the outlet by &amp;#160;an open dam. Downstream the open dam, a channel will lead to a retention basin, where most of storage volume is obtained from the excavation of the grass sloping area, limiting the elevation of the dykes At the end of this basin an open dam will deliver the debris-flow fluid part to a channel passing under the national route and joining the Boite river. Such a solution composed of a deviatory channel, two retention basins (the deep impluvium and that excavated on the sloping grass area) and the channels between and downstream them, has quite a lower costs of construction and maintenance, eliminating the impact on the village because occupying uninhabited areas without interrupting the main roads.&lt;/p&gt;

Grain Taxes in British Ceylon, 1832–1878: Problems in the Field

1968 ◽  
Vol 27 (4) ◽  
pp. 809-834
Author(s):  
Michael W. Roberts
Keyword(s):  
Fourteenth Century ◽  
Caste System ◽  
Paddy Fields ◽  
Fundamental Change ◽  
Agricultural Income ◽  
Private Rights ◽  
Indian Law ◽  
The Right ◽  
The Village ◽  
A Share

Ancient Sinhalese rulers had a right to a share of agricultural income, a right which embraced the produce of the land as well as irrigation rates and was generally paid in kind. In effect, there was a land tax; but the term used (bojika-, bojiya-, or bojaka-pati) was more than mere land tax and connotes a tax on income corresponding to bhaga in Indian law books. By the fourteenth century, if not earlier, there had been a fundamental change. Rather than a tithe from each class of land in the village, the king received the whole of the produce of certain fields, the muttettu, which were cultivated gratis by the villagers who possessed other fields either in return for this service or in recognition of the king's suzreignty. This meant that there were no intermediaries farming (renting) the right to collect the tithe. It also meant that the villager held his paddy fields on an individual and hereditary (paraveny) basis. There was, however, no concept of freehold ownership. Authority was political. One could not distinguish private rights from political allegiance. Landholders combined rights in land with duties to the king. Service was attached to the land and was obligatory to any transferee. In some cases, this service was rendered to the king's chiefs and nominees or to the temples, for the kings distributed largesse in the form of lands and the services attached to them; these were known as nindagam, viharegam or devalegam as distinct from the king's villages, the gabadagam; such recipients were more like feudal overlords than farmers of the revenue. In other cases, villagers of certain castes performed certain specified services for the king, for other castes (usually higher castes) in their village, or for neighboring villages, and in return enjoyed certain fields. It was a system of service tenure that was girded and threaded by the caste system.

scholarly journals PEMBERDAYAAN KELOMPOK TANI DALAM MENINGKATKAN KUALITAS HASIL PERTANIAN DI DESA TEGAL KUNIR LOR KECAMATAN MAUK KABUPATEN TANGERANG

2020 ◽  
Vol 6 (1) ◽  
pp. 29
Author(s):  
Asep Saputra
Keyword(s):  
The Elderly ◽  
Agricultural Extension ◽  
Community Empowerment ◽  
Paddy Fields ◽  
Irrigation Channels ◽  
Farmer Groups ◽  
Village Government ◽  
The Village ◽  
Irrigation Infrastructure

The community empowerment is an effort to provide power or empowerment to the community. According to one expert in which he defines community empowerment, namely as the community's ability to develop and be interrelated so that it has the aim of finding new innovations in a community development. (Mardikanto, 2014). The community Empowerment to be precise in the field of agriculture and several Farmer Groups in Tegal Kunir Lor Village is one of the places that becomes objects to improve the quality of agricultural products. This research uses descriptive study and uses qualitative research methods. Based on the research results, empowerment and development needed to be increased towards planting and farmer motivation. The obstacles faced need to be conquered with the problem of not optimal irrigation or irrigation channels to the rice fields. The paddy fields and irrigation infrastructure and agricultural tools are not yet complete. So, it has not made the agriculture managed by the Farmer Group not able to optimize the paddy fields. Implementation of community spirit has not been optimal regarding several issues of awareness that had not been overcome. Enthusiasm of the community has not fully volunteered to enter the Farmer profession in the village of Tegal Kunir Lor so that only a few people, especially the elderly, are doing rice planting in the fields. Village Government, BPP Agricultural Extension Agency, Village Office Staff need to go counseling to encourage residents around the village. This effort is made to create a resilient agriculture that requires quality human resources and make a successor for future progress through agricultural extension activities with an approach farmer groups that support agriculture-based agribusiness system.

scholarly journals REMOTE SENSING DATA FOR MAPPING THE VILLAGE HAZARD OF THE BAMA MILL SITE

2020 ◽  
Vol 1 (2) ◽  
pp. 28-40
Author(s):  
Vladimir P. Stupin
Keyword(s):  
Remote Sensing ◽  
Debris Flow ◽  
Satellite Images ◽  
Remote Sensing Data ◽  
Point Of View ◽  
Digital Elevation ◽  
Age Limits ◽  
The Village ◽  
Debris Flow Hazard ◽  
Mountain Country

The analysis of open access remote sensing materials (satellite images and digital elevation models) from the point of view of their use for the study and mapping of the debris flow hazard of the Baikal mountain country is carried out. Descriptive signs of mudflow phenomena are described, the age limits of their interpretation are substantiated. Maps of debris flow hazard of various territories of the studied region are given.

scholarly journals Quantitative Analysis of the Debris Flow Societal Risk to People Inside Buildings at Different Times: A Case Study of Luomo Village, Sichuan, Southwest China

2021 ◽  
Vol 8 ◽  
Author(s):  
Li Wei ◽  
Kaiheng Hu ◽  
Jin Liu
Keyword(s):  
Quantitative Analysis ◽  
Debris Flow ◽  
Debris Flows ◽  
Evaluation Model ◽  
Alluvial Fan ◽  
Economic Losses ◽  
Rural Settlements ◽  
Societal Risk ◽  
Flow Intensity ◽  
The Village

Debris flows, which cause massive economic losses and tragic losses of life every year, represent serious threats to settlements in mountainous areas. Most deaths caused by debris flows in China occur in buildings, and the death toll is strongly dependent on the time people spend indoors. However, the role of time spent indoors in the quantitative analysis of debris flow risk has been studied only scarcely. We chose Luomo village in Sichuan atop a debris flow alluvial fan to study the influence of the temporal variation in the presence of people inside buildings on the societal risk. Two types of days (holidays vs. workdays) and two diurnal periods (daytime vs. nighttime) were considered in our risk evaluation model. A questionnaire survey was conducted for each family in the village, and the probability of the temporal impact of a debris flow on every household was calculated based on the average amount of time each member spent in the house. The debris flow hazard was simulated with FLO-2D to obtain the debris flow intensity and run-out map with return periods of 2, 10, 50, and 100 years. The risk to buildings and societal risk to residents were calculated quantitatively based on the probabilities of debris flow occurrence, the probability of the spatial impact, and the vulnerabilities of buildings and people. The results indicated that societal risk on holidays is always higher than that on weekdays, and societal risk at night is also much higher than that in the daytime, suggesting that the risk to life on holidays and at night is an important consideration. The proposed method permits us to obtain estimates of the probable economic losses and societal risk to people by debris flows in rural settlements and provides a basis for decision-making in the planning of mitigation countermeasures.

Magnetic susceptibility, morphological and magnetic mineral composition analysis on leachate sludge

2019 ◽  
Author(s):  
Dini Fitriani ◽  
Kartika Hajar Kirana ◽  
Eleonora Agustine ◽  
Mia Uswatun Hasanah ◽  
dan Anggie Susilawati
Keyword(s):  
Magnetic Susceptibility ◽  
Mineral Composition ◽  
Magnetic Mineral ◽  
Composition Analysis
Sign in / Sign up

Export Citation Format

Share Document