Characterization of landslide distribution and sediment yield in the TsengWen River Watershed, Taiwan

CATENA ◽  
2019 ◽  
Vol 174 ◽  
pp. 184-198
Author(s):  
Ssu-Yao Yang ◽  
Chyan-Deng Jan ◽  
Haw Yen ◽  
Ji-Shang Wang
2015 ◽  
Vol 31 (1) ◽  
pp. 64-79 ◽  
Author(s):  
David Brauer ◽  
R. Louis Baumhardt ◽  
Dennis Gitz ◽  
Prasanna Gowda ◽  
James Mahan

RBRH ◽  
2021 ◽  
Vol 26 ◽  
Author(s):  
Marcio Sousa da Silva ◽  
Rosane Lopes Cavalcante ◽  
Pedro Walfir Martins e Souza Filho ◽  
Renato Oliveira da Silva Júnior ◽  
Paulo Rógenes Pontes ◽  
...  

ABSTRACT Understanding the hydrosedimentological dynamics of tropical rivers is a challenge in the Amazon due to its remote and difficult-to-access areas. This study was based on data collected from 16 hydrosedimentological control sections in the 6 subbasins that make up the Itacaiúnas River Watershed (IRW), with 4 annual campaigns (high water levels, rising water levels, falling water levels, low water levels) between 2015 and 2019, with the aim of constructing and comparing sediment rating curves and sediment yield. The data at the mouth of the IRW revealed that the rainy season is responsible for 93% of liquid discharges (Q) with an average of 1460.88 m3/s and for 98% of suspended sediment discharges (SSQ) with an average of 5864.15 tons/day. Suspended sediment concentrations (SSCs) are low to moderate (50 to 150 mg/l). The curves encompassing all the data showed R2 values (0.92 to 0.99) greater than the curves with only the values of the rainy or dry season, indicating a good fit of the power equation to the SSQ and Q data for all sections studied. Higher values of coefficients a and b show areas of greater sediment production and deforestation, as well as areas with new sources of sediment and preserved forest.


2017 ◽  
Vol 2 (1) ◽  
pp. 26 ◽  
Author(s):  
Kuldeep Pareta ◽  
Upasana Pareta

In the present study, an attempt has been made to study the quantitative geomorphological analysis and hydrological characterization of 95 micro-watersheds (MWS) of Baira river watershed in Himachal Pradesh, India with an area of 425.25 Km2. First time in the world, total 173 morphometric parameters have been generated in a single watershed using satellite remote sensing data (i.e. IRS-P6 ResourceSAT-1 LISS-III, LandSAT-7 ETM+, and LandSAT-8 PAN & OLI merge data), digital elevation models (i.e. IRS-P5 CartoSAT-1 DEM, ASTER DEM data), and soI topographical maps of 1: 50,000 scale. The ninety-five micro-watersheds (MWS) of Baira river watershed have been prioritized through the morphometric analysis of different morphometric parameters (i.e. drainage network, basin geometry, drainage texture analysis, and relief characterizes ). The study has concurrently established the importance of geomorphometry as well as the utility of remote sensing and GIS technology for hydrological characterization of the watershed and there for better resource and environmental managements.


1992 ◽  
Vol 34 (4) ◽  
pp. 297-308 ◽  
Author(s):  
José F. Calvo ◽  
José A. Palazón ◽  
Miguel A. Esteve ◽  
María L. Suárez ◽  
A. Torres ◽  
...  

2018 ◽  
Vol 28 (55) ◽  
pp. 898-917
Author(s):  
Lucas Pereira Soares ◽  
Ernane Cortez Lima

O presente trabalho tem como objetivo apresentar uma caracterização climática e hidrológica das nascentes do alto curso do Rio Acaraú, localizado no Maciço Residual Serra das Matas, região centro-oeste do estado do Ceará, compreendendo uma área de 142,63Km2. Neste estudo, procurou-se contextualizar a área da pesquisa, através da análise dos atributos climáticos, tais como dinâmica e elementos do clima, sendo temperatura e precipitação, com ênfase no balanço hídrico e sua relação com os recursos hídricos disponíveis à área, sendo elaborado mapas e gráficos temáticos, caracterizando as informações climatológicas. A análise foi desenvolvida através do cruzamento das informações climáticas, e demais informações geoambientais, visando identificar as peculiaridades no que tange a tipologia climática semiárida, a fim de conceber as limitações e potencialidades dos recursos naturais dessa área, com destaque aos recursos hídricos. Finalmente, após a integração desses dados são apresentados resultados no que tange a tipologia semiárida, em integração aos recursos hídricos da região, com objetivo de subsidiar o desenvolvimento do Projeto de Revitalização das Nascentes do Rio Acaraú, desenvolvido pelo Comitê de Bacia Hidrográfica do Rio Acaraú, para que as medidas corretamente aplicadas possam contribuir para a preservação da qualidade ambiental no alto curso do Rio Acaraú-CE. Palavras–chave: balanço hídrico, recursos hídricos, semiárido.AbstractThe aim of this work is to present a climatic and hydrological characterization of the water springs of the upper course of the Acaraú River, located in the Residual Mass Serra das Matas, Central-West region of the state of Ceará, comprising an area of 142, 63Km2. In this study, we sought to contextualize the area of research, through the analysis of the climatic attributes, such as dynamics and elements of the climate, being temperature and rainfall, with emphasis on the hydric assessment and its relation with the hydric resources available to area, being elaborated maps and thematic charts, featuring the climatological information. The analysis was developed through the intersection of climate information, and other geoenvironmental information, aiming at identifying the peculiarities of the semi-arid climatic typology, in order to devise the limitations and potentialities of the resources Of this area, with emphasis on hydric resources. Finally, after the integration of these data are presented results with regard to the semi-arid typology, in integration with the region hydric resources , with the objective of subsidizing the development of the project of revitalization of the water springs of the Acaraú River, Developed by the Acaraú River Watershed Committee, so that properly applied measures can contribute to the preservation of environmental quality in the upper course of the Acaraú-CE River.Key words: hydric assessment, hydric resources, semi-arid.


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