Evolutionary, multi-scale analysis of river bank line retreat using continuous wavelet transforms: Jamuna River, Bangladesh

In this study continuous wavelet transforms are used to explore spatio-temporal patterns of multi-scale bank line retreat along a 204 km reach of the Jamuna River, Bangladesh. A sequence of eight bank line retreat series, derived from remotely-sensed imagery for the period 1987-1999, is transformed using the Morlet mother wavelet. Bank erosion is shown to operate at several characteristic spatial and temporal scales. Local erosion and bank line retreat are shown to occur in short, well defined reaches characterised by temporal persistence at the same location, and separated by relatively stable reaches. In contrast, evidence of downstream propagation of bank line retreat patterns is evident at larger spatial scales. The intensity of localised bank line retreat (i.e. at scales of 0 - 20 km) is strongly related to the magnitude of monsoonal peak discharge, but this relationship weakens as the spatial scale of erosion increases. The potential of continuous wavelet analysis to enhancing our understanding of morphological evolution in complex fluvial systems with multi-channel planforms is discussed

Clinical study of Raktamokshana procedure in the disease Gridhrasi

Gridhrasi is one type of Nanatmaja Vata Vyadhi as described in Charaka Samhita. The signs and symptoms of this disease keep much relationship with those of Sciatica according to modern medical science. This disease is a painful neuralgia of Sciatic nerve, in which pain starts from the gluteal region of the patient and radiates down gradually through the back of thigh, knee, calf and outer border of foot. Traditional Ayurvedic medicines applied to alleviate pain of this disease sometimes seem insufficient. In this condition a clinical trial has been done through the application of Multiple Vacuum Syringe Blood Aspiration Procedure (MVSBAP) along with the traditional Ayurvedic medicines. Raktamokshana is an effective bloodletting therapy. Classically it is described as six types i.e., (1) Shringa, (2) Jalauka, (3) Alabu, (4) Shiravedha, (5) Prachchhana and (6) Ghatiyantra. In the present study, the Multiple Vacuum Syringe Blood Aspiration Procedure (MVSBAP), a combination of Prachchhana and Ghatiyantra, is applied to the Gridhrasi patients. Total 60 patients are selected for the clinical trial by simple random sampling method from the OPD and IPD of Government Ayurveda College and Hospital, Varanasi, Uttar Pradesh. Two groups are made like Group-A and Group-B, each consisting of 30 patients. Patients of Group-A are treated with only traditional Ayurvedic medicines and patients of Group-B are treated with MVSBAP along with traditional Ayurvedic medicines. After one month of treatment, final assessment is done on statistical parameters and the result is incurred

Flood Hazard Mapping for

ABSTRACT: There are lager development in the field of real estate are happening in study area. For them it is very important to consider the areas which are flood prone. This has to be considered a vital component before land use planning of any city. Here we have prepared a flood hazard map by considering the various aspects of the environment and demographic factors which are responsible for the floods. Here we have also considered the distances of the flood prone areas from the nearest water resources which are contributing to the flood

Identification of erosion-prone areas using modified morphometric prioritization method and sediment production rate: a remote sensing and GIS approach

Watersheds from semiarid zones are sensitive to land degradation processes wherein the morphometric investigation is an important aspect to unwrap the susceptible areas. Hence it is a prerequisite for the assessment of erosional pattern of the watershed. Thus, based on the response to erosional processes, prioritization task has been undertaken for fourteen sub-watersheds from basaltic region of Western Ghats of India. A morphometry-based framework using weighted sum analysis (WSA) coupled with the remote sensing data, field data and topographical maps were generated on geographical information system (GIS) platform to estimate the soil erosion susceptibility. The study also evaluates the performance of this new methodology by considering the sediment production rate (SPR) of these sub-watersheds. The resultant WSA-SPR model has prioritized the study area into high, moderate low and very low categories. The high and moderate priority areas lie in the proximity of outlet, upper elevated and undulating terrain of the watershed. It represents 41.38% of the total area covering SW1, 3, 13 and 14 sub-watersheds. This study proposes a useful tool to define areas for planning the strategies to control soil erosion and promote soil conservation