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| Content Provider | Springer Nature Link |
|---|---|
| Author | Manna, Abhijit Maiti, Ramkrishna |
| Copyright Year | 2015 |
| Abstract | Surface excavation and overburden dumping in the Raniganj Coalfield have defaced the natural topography and impacted the hydrology. Excavation and dumping of overburden within the channels has obstructed streamflow and altered water availability in the lower parts of small catchment basins. The surface drainage paths of ephemeral channels and flow accumulation by channel networks was estimated from digital elevation remote sensing images using Arc Hydro Tools of Arc GIS software. The runoff from small basins was estimated using the US Soil Conservation Service Curve Number method and initial abstractions (depression storage) were estimated from CARTOSAT DEM satellite images using GIS techniques. In the studied area, 129 depressions (abandoned and working mines) were identified within 53 small basins over an area of more than 24 km$^{2}$. The excavated areas arrest surface runoff, leading to degradation of downstream channels.Abgrabungen und Abraumverkippung im Raniganj Kohlefeld haben die natürliche Topographie beseitigt und die Hydrologie verändert. Abgrabung und Überkippung kleiner Fließgewässer behindern den Abfluss und veränderten die Wasserverfügbarkeit in den stromab gelegenen Teilen der Fließgewässer. Mit Hilfe des Arc Hydro Tools von Arc GIS wurden aus digitalen Fernerkundungsbildern und entsprechenden Höhenmodellen die Fließwege ephemeraler Bäche und deren zur Abflusskonzentration führenden Netzwerke ermittelt. Der Abfluss aus kleinen Teileinzugsgebieten wurde mit der US Soil Conservation Service Curve Number-Methode abgeschätzt. Der anfängliche Abflussrückhalt (Speicherung in Geländevertiefungen) wurde aus CARTOSAT DEM Satellitenbildern mittels GIS-Techniken abgeschätzt. Im untersuchten Gebiet mit mehr als 24 km$^{2}$ Größe wurden 53 Kleineinzugsgebiete und darin insgesamt 129 Geländevertiefungen (stillgelegte und aktive Tagebaue) festgestellt. Der Rückhalt von Oberflächenabfluss im Bergbaugebiet führte zur Beeinträchtigung der stromab gelegenen Bachabschnitte.La excavación de superficie y las pilas de residuos en el campo de carbón Raniganj han desfigurado la topografía natural y ha impactado en la hidrología. La excavación y las pilas de residuos dentro de los canales han obstruido el flujo en los canales y han alterado la disponibilidad de agua en las partes más bajas de los pequeños reservorios de captación. Se estimaron las vías de drenaje de superficie de los canales efímeros y la acumulación de flujo por las redes de canales, utilizando imágenes digitales de sensores remotos con el software Arc Hydro Tools de Arc GIS. El escurrimiento desde los pequeños reservorios fue estimado usando el método de número de curva del servicio de conservación de suelos de US y las abstracciones iniciales (almacenamiento en la depresión) fueron estimadas con imágenes satelitales CARTOSAT DEM usando técnicas GIS. En el área estudiada, 129 depresiones (minas abandonadas y minas en actividad) fueron identificadas dentro de 53 pequeños reservorios en un área de más de 24 km2. Las áreas excavadas detienen la corriente superficial, lo que lleva a la degradación de los canales de aguas abajo.Raniganj矿区露天矿的地表挖掘和覆岩转储破坏了天然地形,影响着当地水文条件。覆岩挖掘及其渠道倾卸阻碍了水流方向、截断了下游集水盆地水源。利用ArcGIS的Arc Hydro Tools工具处理数字高程遥感图像估算了暂时性河流的排泄路径及渠网的水流汇集。采用美国水土保持局(SCS)的径流曲线数模型估算小流域内径流,基于GIS的CARTOSAT DEM卫星图像估算了降水初损(田洼量)。在研究区超过24平方公里范围内的53个小流域中识别出129个洼地(包括废弃矿和生产矿井)。开挖区吸收地表径流、破坏下游渠道。. |
| Starting Page | 156 |
| Ending Page | 167 |
| Page Count | 12 |
| File Format | |
| ISSN | 10259112 |
| Journal | Mine Water and the Environment |
| Volume Number | 35 |
| Issue Number | 2 |
| e-ISSN | 16161068 |
| Language | Chinese |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2015-05-10 |
| Publisher Institution | International Mine Water Association (IMWA) |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Initial abstraction River obstruction Runoff contributing area Runoff discharge Small catchment basin Geology Hydrogeology Water Quality/Water Pollution Energy Economics Ecotoxicology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Water Science and Technology Geotechnical Engineering and Engineering Geology |
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