Morphometric analysis is crucial for advancing in various fields,including geomorphology,hydrology,environmental sciences,and geological studies.The objective of the present study is to understand the hydrological and...Morphometric analysis is crucial for advancing in various fields,including geomorphology,hydrology,environmental sciences,and geological studies.The objective of the present study is to understand the hydrological and morphological characteristics of the Shimsha River,which flows through the fluvial deltaic plain in the semiarid environment of Karnataka.Remote sensing and geographic information system have been used as mapping and efficient tools for drainage basin morphometry.The emphasis is laid on geological,geomorphological,hydrological,and fluvial features under linear,aerial,shape,relief,geometric,morphotectonic,and social morphometric parameters.The basin area is about 8741 km^(2),with a dendritic to subdendritic pattern.The sinuosity index is 1.6,which indicates meandering in nature.Areal parameters suggest that the drainage basin has a moderate surface permeability,homogenous lithology,run-off,erodibility,low relief conditions,infiltration rate,and a well-developed drainage network.Shape parameter indicates that the basin is subelongated with flatted peak flow and longer duration.Relief factor indicated low relief and intermediate stage of the incision rate.The river has an asymmetry factor is 38.65 and it shows that the channel has shifted southwest.The river shows a perfectly graded profile,with a considerable amount of incision and deposition along its profile showing tectonically unstable,based on the spatial distribution of the potential groundwater zone of about(5260 km^(2)),other waterbody masks covered(285 km^(2)).Standard visual interpretation techniques were applied to recognize and interpret the land use and land cover patterns.A basin rich in clay-rich soil may lead to a massive flood.Essentially,physiographical and structural conditions controlled the stream order of the basin.The increase in the stream length ratio from lower to a higher order.That indicates a mature geomorphic stage of the study area.Rainfall and local lithology impact the development of segments of the stream.展开更多
A two-dimensional algorithm for underground water flow simulation was modified and adapted to the geohydrologic conditions of the Guadalupe valley located in the state of Baja California in northern México. In or...A two-dimensional algorithm for underground water flow simulation was modified and adapted to the geohydrologic conditions of the Guadalupe valley located in the state of Baja California in northern México. In order to solve the numerical model using the balance equation, the central finite differences with spatial and temporal constant increments method were used. Such model considers a heterogeneous and transient unconfined aquifer. Modeling and calibration processes are presented using the data of water table levels provided by the water level data loggers installed in a monitoring network and precipitation data from climatic stations of both seasons: 2009-2010 and 2010-2011. It was possible to locate, correlate and model specific rainfall-recharge events with the aim of obtaining an estimation of how these events are directly reflected on the water table level of the aquifer and how it reacts against simulated extraordinary events.展开更多
文摘Morphometric analysis is crucial for advancing in various fields,including geomorphology,hydrology,environmental sciences,and geological studies.The objective of the present study is to understand the hydrological and morphological characteristics of the Shimsha River,which flows through the fluvial deltaic plain in the semiarid environment of Karnataka.Remote sensing and geographic information system have been used as mapping and efficient tools for drainage basin morphometry.The emphasis is laid on geological,geomorphological,hydrological,and fluvial features under linear,aerial,shape,relief,geometric,morphotectonic,and social morphometric parameters.The basin area is about 8741 km^(2),with a dendritic to subdendritic pattern.The sinuosity index is 1.6,which indicates meandering in nature.Areal parameters suggest that the drainage basin has a moderate surface permeability,homogenous lithology,run-off,erodibility,low relief conditions,infiltration rate,and a well-developed drainage network.Shape parameter indicates that the basin is subelongated with flatted peak flow and longer duration.Relief factor indicated low relief and intermediate stage of the incision rate.The river has an asymmetry factor is 38.65 and it shows that the channel has shifted southwest.The river shows a perfectly graded profile,with a considerable amount of incision and deposition along its profile showing tectonically unstable,based on the spatial distribution of the potential groundwater zone of about(5260 km^(2)),other waterbody masks covered(285 km^(2)).Standard visual interpretation techniques were applied to recognize and interpret the land use and land cover patterns.A basin rich in clay-rich soil may lead to a massive flood.Essentially,physiographical and structural conditions controlled the stream order of the basin.The increase in the stream length ratio from lower to a higher order.That indicates a mature geomorphic stage of the study area.Rainfall and local lithology impact the development of segments of the stream.
文摘A two-dimensional algorithm for underground water flow simulation was modified and adapted to the geohydrologic conditions of the Guadalupe valley located in the state of Baja California in northern México. In order to solve the numerical model using the balance equation, the central finite differences with spatial and temporal constant increments method were used. Such model considers a heterogeneous and transient unconfined aquifer. Modeling and calibration processes are presented using the data of water table levels provided by the water level data loggers installed in a monitoring network and precipitation data from climatic stations of both seasons: 2009-2010 and 2010-2011. It was possible to locate, correlate and model specific rainfall-recharge events with the aim of obtaining an estimation of how these events are directly reflected on the water table level of the aquifer and how it reacts against simulated extraordinary events.
