Mercury speciation in preserved sludge which is estimated to be remaining under the reclaimed land area of Minamata Bay Japan

2017 ◽  
Vol 280 ◽  
pp. S203 ◽  
Author(s):  
Mineshi Sakamoto ◽  
Takaaki Itai ◽  
Koji Marumoto ◽  
Keisuke Mori ◽  
Milena Horvat ◽  
...  
Keyword(s):  
Mercury Speciation ◽  
Land Area ◽  
Reclaimed Land ◽  
Minamata Bay

Mercury speciation in preserved historical sludge: Potential risk from sludge contained within reclaimed land of Minamata Bay, Japan

2020 ◽  
Vol 180 ◽  
pp. 108668 ◽  
Author(s):  
Mineshi Sakamoto ◽  
Takaaki Itai ◽  
Kohji Marumoto ◽  
Masumi Marumoto ◽  
Hitoshi Kodamatani ◽  
...  
Keyword(s):  
Potential Risk ◽  
Mercury Speciation ◽  
Reclaimed Land ◽  
Minamata Bay

scholarly journals A new approach to increase land reclamation rate in coal mining subsidence area: A case study of Guqiao Coal Mine, China

2021 ◽  
Author(s):  
Gensheng LI ◽  
Jianxuan Shang ◽  
Zhenqi Hu ◽  
Dongzhu Yuan ◽  
Pengyu Li ◽  
...  
Keyword(s):  
Coal Mining ◽  
Coal Mine ◽  
Land Reclamation ◽  
Water Area ◽  
Land Area ◽  
Reclaimed Land ◽  
Land Protection ◽  
Mining Areas ◽  
Concurrent Mining And Reclamation ◽  
Coal Mining Subsidence

Underground coal mining will inevitably cause land ponding in high groundwater table, which will affect the land sustainable development. However, the traditional reclamation (TR) is poor in land rate. Thus, finding a suitable reclamation approach is crucial to alleviate the conflicts between coal exploitation and land protection. In this paper, taking Guqiao Coal Mine of China was seriously affected by mining-induced ponding as an example. Firstly, dynamic distribution of surface subsidence and land damage from 2007 to 2017 was revealed base on concurrent mining and reclamation (CMR). Second, the land-water layout of five reclamation schemes (no reclamation, TR, CMR I, CMR II and CMR III) were simulated. Then, and the dynamic filling elevation model and filling thickness model were constructed. Finally, the sequence of earthwork allocation was optimized. The results revealed that: 1) reclaimed land area: CMR III > CMR II > CMR I > TR > no reclamation; 2) The digging depth is directly proportional to earthwork volume and land area, and inversely proportional to water area, but with increase of digging depth, the increase in the reclaimed land area relatively slowed down; 3) CMRs had reclaimed 426.31~637.82 ha and 259.62~471.13 ha more than the no reclamation and TR respectively. Compared with the no reclamation and TR, CMRs can increase the proportion of reclaimed land by 33.77~50.52% and 20.57~37.32% respectively. The research results provide a reference to increase the reclamation rate of mining areas in the high phreatic table.

Does Nest Predation Influence Colony Movements of Saunders's Gulls (Saundersilarus saundersi) in a Reclaimed Land Area?

2018 ◽  
Vol 35 (5) ◽  
pp. 389-395
Author(s):  
Hyun-Ju Yoon ◽  
Eun-Jin Joo ◽  
Dong-Soo Ha ◽  
Hyung-Kyu Nam ◽  
Jongmin Yoon
Keyword(s):  
Nest Predation ◽  
Land Area ◽  
Reclaimed Land

Mercury Speciation in the Water of Minamata Bay, Japan

2010 ◽  
Vol 218 (1-4) ◽  
pp. 399-412 ◽  
Author(s):  
Akito Matsuyama ◽  
Tomomi Eguchi ◽  
Ikuko Sonoda ◽  
Akihide Tada ◽  
Shinichirou Yano ◽  
...  
Keyword(s):  
Mercury Speciation ◽  
Minamata Bay

Soil Labile Organic Carbon With Different Land Uses in Reclaimed Land Area From Taihu Lake

Soil Science ◽  
2010 ◽  
Vol 175 (12) ◽  
pp. 624-630 ◽  
Author(s):  
Ying Wang ◽  
Honghua Ruan ◽  
Liangliang Huang ◽  
Yuqing Feng ◽  
Yan Qi ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Taihu Lake ◽  
Land Uses ◽  
Land Area ◽  
Reclaimed Land ◽  
Labile Organic Carbon ◽  
Soil Labile Organic Carbon

scholarly journals A CASE STUDY ON PERFORMANCE OF RESHAPING BERM BREAKWATERS: ORDU GIRESUN INTERNATIONAL AIRPORT, TURKEY

2018 ◽  
pp. 40
Author(s):  
Gulizar Ozyurt Tarakcioglu ◽  
Cuneyt Baykal ◽  
Semih Bezazoglu ◽  
Dogukan Atak ◽  
Aysen Ergin ◽  
...  
Keyword(s):  
Cross Sections ◽  
Return Period ◽  
High Water ◽  
Land Area ◽  
Reclaimed Land ◽  
International Airport ◽  
Wave Characteristics ◽  
Black Sea Coast ◽  
The Stability

In this study, the stability and serviceability (wave overtopping) of hardly-reshaping berm breakwater of Ordu-Giresun International Airport and four alternative cross-sections of fully- and partly-reshaping berm breakwaters are assessed by physical model experiments. Ordu-Giresun International Airport is a public airport constructed on an approximately 1.77 km-square reclaimed land at the eastern Black Sea coast of Turkey. The reclaimed land area is protected with a 7345 m long hardly reshaping rubble mound berm breakwater at a depth of 11 m (MSL). The design high water level (HWL) corresponding to 100-yr return period is calculated as +1.12 m. The bottom slope from deep water up to 20 m water depth is around 1:50 and becomes steeper (1:20) towards the shore. The design wave characteristics at the toe of the structure (100-yr return period) is determined as Hs = 6.68m, Tm= 10.80 sec.

scholarly journals Development of spontaneous vegetation on reclaimed land in Singapore measured by NDVI

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245220
Author(s):  
Leon Yan-Feng Gaw ◽  
Daniel Rex Richards
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Temporal Trends ◽  
Google Earth ◽  
Land Area ◽  
Landsat Images ◽  
Reclaimed Land ◽  
Vegetation Development ◽  
Urban Greenery ◽  
Spontaneous Vegetation

Population and economic growth in Asia has led to increased urbanisation. Urbanisation has many detrimental impacts on ecosystems, especially when expansion is unplanned. Singapore is a city-state that has grown rapidly since independence, both in population and land area. However, Singapore aims to develop as a ‘City in Nature’, and urban greenery is integral to the landscape. While clearing some areas of forest for urban sprawl, Singapore has also reclaimed land from the sea to expand its coastline. Reclaimed land is usually designated for future urban development, but must first be left for many years to stabilise. During the period of stabilisation, pioneer plant species establish, growing into novel forest communities. The rate of this spontaneous vegetation development has not been quantified. This study tracks the temporal trends of normalized difference vegetation index (NDVI), as a proxy of vegetation maturity, on reclaimed land sensed using LANDSAT images. Google Earth Engine was used to mosaic cloud-free annual LANDSAT images of Singapore from 1988 to 2015. Singapore’s median NDVI increased by 0.15 from 0.47 to 0.62 over the study period, while its land area grew by 71 km2. Five reclaimed sites with spontaneous vegetation development showed variable vegetation covers, ranging from 6% to 43% vegetated cover in 2015. On average, spontaneous vegetation takes 16.9 years to develop to a maturity of 0.7 NDVI, but this development is not linear and follows a quadratic trajectory. Patches of spontaneous vegetation on isolated reclaimed lands are unlikely to remain forever since they are in areas slated for future development. In the years that these patches exist, they have potential to increase urban greenery, support biodiversity, and provide a host of ecosystem services. With this knowledge on spontaneous vegetation development trajectories, urban planners can harness the resource when planning future developments.

Predicted Restoration of the Surrounding Marine Environment after an Artificial Mercury Decontamination at Minamata Bay, Japan - Economic Values for Natural and Artificial Processes

1992 ◽  
Vol 25 (11) ◽  
pp. 141-148 ◽  
Author(s):  
A. Kudo ◽  
S. Miyahara
Keyword(s):  
Half Life ◽  
Surface Sediments ◽  
Economic Value ◽  
Inorganic Mercury ◽  
Reclaimed Land ◽  
Natural Processes ◽  
Yatsushiro Sea ◽  
Land Mass ◽  
Polluted Sites ◽  
Minamata Bay

More than 35 years ago, an accident surfaced because of human misery at Minamata Bay, Japan. By 1960, more than 100 people suffered (mortality rate was over 20%) by eating fish containing methylmercury. By 1987, 1742 people were identified with this Minamata disease. The methylmercury along with inorganic mercury was released from a nearby chemical factory into the Bay, contaminating not only fish but the entire ecosystem including the bottom sediments. The amount of mercury deposited in the sediments was considered to be 150 tons. The Japanese Government initiated, in 1984, a decontamination project vacuuming the contaminated sediments into a sealed area creating a reclaimed land mass of 582,000 m2. The movement of the mercury deposited in the Bay outward to Yatsushiro Sea, was observed during the last 16 years by sampling and analyzing the surface sediments of Yatsushiro Sea. Since 1975, the deposited mercury moved continuously outside from the Bay at an annual rate of 3.7 tons. The initiation of the artificial decontamination (over $500 million in US funds), however, changed the pattern of mercury movement and drastically reduced its contents with a half-life of 1.83 years. Since 1985, the amounts of mercury in the surface sediments of Yatsushiro Sea have been decreasing dramatically with a half-life of 9.5 years. If this present trend of decrease continues, it becomes possible to predict that the Sea would be completely restored by 2011 AD. Another interesting observation was a historical storm in 1982, which cleaned-up the surface sediments of Yatsushiro Sea with a half-life of 2.76 years. If the clean-up effect of the natural processes in Yatsushiro Sea was compared to the artificial one, its economic value was calculated to be $96 million (US funds). Any decontamination attempt for polluted sites should consider a combination of the natural and artificial decontamination processes for economic reasons.

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