Numerical hysteresis model for intermittent studies in unsaturated soils

In the present study, the use of one of the recent dependent domain models of capillary hysteresis in the numerical analysis of intermittent infiltration and redistribution of water in two types of soils (a sand and Rubicon Sandy Loam) has been shown. The numerical results for both the soils have been presented in terms of pressure head depth, moisture content depth and the pressure head-moisture content relationships. The capillary hysteresis model has been found to be very useful for the prediction of both wetting and drying scanning curves of various orders.     

Lunar paleointensity from three Apollo 15 crystalline rocks using an A.R.M. method

Three Apollo 15 crystalline rocks were used for determining lunar paleointensity at 3.3 AE using a new ARM-method of paleointensity determination. The values were found to be 4900 γ, 2200 γ, and 7600 γ. Thus an average lunar paleointensity of 4900 γ is concluded for this period.     

TheH-functions of radiative transfer in an active amplifying medium

We obtain two explicit closed form representations of Chandrasekhar'sH-functionsH(z) characterising transfer of radiation in an active amplifying medium corresponding to the dispersion function $$T(z) = 1 - 2z^2 \int\limits_0^1 {Y(x)dx/(z^2 - x^2 ), Y(x)< 0 on [0, 1]} .$$ Their basic properties are derived and the values of theH-functionH(z, ω) whenY(x)=ω/2, are approximately computed for values of ω in the range (?10^?12)–(?10²) and for values ofzε[0, 1].     

Long-term seismic observations along Myanmar–Sunda subduction margin: insights for 2004 Mw > 9.0 earthquake

International Journal of Earth Sciences - The present study investigates the temporal variation of few seismic parameters between the Myanmar (Zone I), Andaman–Nicobar–Northwest Sumatra...     

Assessment and monitoring of urbanisation on Himalayan lacustrine environment-a case study in Mirik municipality area

The Mirik lake is a well-known tourist destination in the Darjeeling Himalayan region of West Bengal. In the last few decades, the lake area experienced a surge in demand for the hospitality industry with the consequences of unrestricted municipal town growth. On this perspective, this research work addresses the contemporary problems of the Mirk municipality area involving the lake system using technologies of remote sensing and GIS. In accordance with the primary objective, the detailed land use/land cover change analysis of the past twenty years shows a significant escalating trend in built-up area as it has increased from 149.85 ha in 2000 to 178.25 ha in 2020, where the lake expresses a steady reduction of its perennial part. The gradual shrinkage in the lake area may become of grave concern and therefore, this particular work tries to examine the water quality parameters of Mirik lake. Analyses have shown that the lake shrinkage may be attributed to waste disposal, landfill pollution etc., substantially contributed to the raised level of suspended sediment concentration (3724.26 mg/lit in 2020) near the boundaries. Moreover, the outcome of the developed water pollution model identifies that the western and south-western parts of the lake are the most polluted regions and confirms numerous inlets of the western side push up the level of phosphorus, nitrogen and biological oxygen demand in lake water. Such lake degradation is a real threat to the mountainous lacustrine environment, and it requires comprehensive plans for better management practices at some regular interregnum.

     

The 2020 Mw 5.5 Mizoram earthquake and associated swarm activity in the junction of the Surma Basin and Indo-Myanmar Subduction Region

Natural Hazards - Two Artificial Intelligence (AI) methods, Fuzzy Inference System (FIS) and Artificial Neural Network (ANN), are applied to Landslide Susceptibility Mapping (LSM), to compare...