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Siltation

About: Siltation is a research topic. Over the lifetime, 1420 publications have been published within this topic receiving 20983 citations.


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01 Jan 2013
TL;DR: In this article, a study on the future storage capability along with reliability in the serviceability of the Maithon reservoir, India was presented, where surveyed capacity elevation data for the year 1956, 1965, 1971, 1979, 1987, 1994, 2002 and 2010 were considered for the analysis.
Abstract: Reservoir siltation is inevitable because of continuous deposition of silts, pollutants etc due to soil erosion from upstream part of river and domestic / industrial waste intrusion in the river. The pace of siltation process can only be retarded which would indirectly aid to life of the reservoir. This paper presents a study on the future storage capability along with reliability in the serviceability of the Maithon reservoir, India. The surveyed capacity elevation data for the year 1956, 1965, 1971, 1979, 1987, 1994, 2002 and 2010 were considered for the analysis. A graphical relation for storage loss at different stages such as dead storage, live storage, flood storage level and overall capacity loss are presented. Mathematically linear trend equations of the above relations are developed with vide validation with the original surveyed data. From the above equations the loss of storage capacity in the future years are also found out at the various stages of the reservoir storage.

6 citations

Dataset
01 Aug 2009

6 citations

Book ChapterDOI
01 Jan 2010
TL;DR: A detailed cadastral level survey of land resources occurring in Sivagangai block of Tamil Nadu state, India, covering an area of about 44,600 ha, was carried out during the period 2006−2007.
Abstract: A detailed cadastral level survey of land resources occurring in Sivagangai block of Tamil Nadu state, India, covering an area of about 44,600 ha, was carried out during the period 2006−2007. Based on this, 18 soil series were identified and 103 phases mapped at 1:12,500 scale. The study revealed severe sheet erosion on the uplands, heavy siltation of tanks and development of salinity/sodicity at the lowlands as major causes for the drastic decline in productivity. The study warrants systematic and timely efforts to arrest soil erosion on the uplands, proper maintenance of tanks to increase the storage capacity and recharge of the aquifers and providing drainage facilities to reclaim the lowlands and prevent the development of salinity/sodicity in the study area.

6 citations

Book ChapterDOI
01 Jan 2007
TL;DR: In this article, the authors used the rating curve of the relationship between discharge and sediment at station M.145 from 1996 to 2000 obtained using water level discharge and a sediment estimation (LQS) to predict the lifespan of Lam Phra Phloeng Reservoir, in which the capacity has been reduced by sedimentation.
Abstract: To predict the lifespan of Lam Phra Phloeng Reservoir, in which the capacity has been reduced by sedimentation, both sediment inflow volumes generated from upstream areas of the catchment and deposition in the reservoir were calculated. The rating curve of the relationship between discharge and sediment at station M.145 from 1996 to 2000 obtained using water level discharge and a sediment estimation (LQS) showed that the annual sediment volume resulting from inflow to the Lam Phra Phloeng catchment (820 km2) was 0.36553 Mm3 (million cubic meters). The siltation rate and annual sediment volume in the reservoir were obtained for a series of periods. During the first period, from 1970 to 1983, the annual sediment volume was 2.23 Mm3 and the erosion rate was 2.72 mm/year/km2. This period coincided with a 73.57% decrease in forest area. The second period, from 1983 to 1991, had a lower annual sediment volume of 1.625 Mm3 and a lower erosion rate of 1.98 mm/year/km2. The forest area increased 1.05% during this period. In the recent period, from 1991 to 2000, the annual sediment volume was 0.36553 Mm3 and the erosion rate was 0.445 mm/year/km2. These low rates were associated with a 4.95% increase in forest area. Since the 1960s, the agriculture of Thailand has shifted from subsistence farming to a cash crop culture to develop the social economy. This shift has resulted in the conversion of forests to cultivated lands. As a result, rapid deforestation has occurred, and soil erosion in crop fields has become a serious problem with regard to resource degradation. Soil erosion from crop fields has generally been recognized since the old days.

6 citations

Journal ArticleDOI
TL;DR: In this paper, the growth pattern of Jiuduansha Island, the largest uninhabited alluvial island in the Changjiang Estuary, is studied in terms of the change in elevation, position and area over the past 50 years through using satellite-derived instantaneous shoreline positions and high/low tide exposure areas based on 497 satellite images from 1974 to 2020.
Abstract: The evolution of the Changjiang Delta is obviously affected by current rapidly rising sea level and drastically declining river discharge, and it is also vital for the sustainable development of Shanghai and the Changjiang River Economic Belt, which represent China’s economic development leader and major national strategic area, respectively. In this paper, the growth pattern of Jiuduansha Island, the largest uninhabited alluvial island in the Changjiang Estuary, is studied in terms of the change in elevation, position and area over the past 50 years through using satellite-derived instantaneous shoreline positions and high/low tide exposure areas based on 497 satellite images from 1974 to 2020; and the influencing factors and future development patterns are further discussed by comparison with other alluvial islands or sandbars in the estuary The results show that Jiuduansha Island has maintained a rapid or even accelerated area growth rate, although the sediment discharge of the Changjiang River has sharply decreased in recent decades This sustained growth is mainly attributed to the existence of the estuarine turbidity maximum zone, coarsening fluvial sediment, onshore sediment replenishment by tide, cone-like geomorphology of Jiuduansha Island, and siltation promotion effect of vegetation The growth rate of the low tide exposure area of Jiuduansha Island increased from 1.9 km2 a−1 in 1974–1990 to 3.0 km2 a−1 in 1990–2020, and the growth rate of the high tide exposure area reached as high as 3.7 km2 a−1 in 1994–2020. The implementation of the Deep-Water Channel Project has significantly affected the evolution of Jiuduansha Island, including shifting the heads of Shangsha and Zhongxiasha from severe retreat to rapid accretion, and promoting tidal flat progradation seaward of the Jiangyanansha and Zhongxiasha, but restricting the growth of the low tide exposure area of Jiuduansha Island.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023122
2022214
202159
202072
201964
201871