Climate change and soil salinity: The case of coastal Bangladesh

Abstract

This paper estimates location-specific soil salinity in coastal Bangladesh for 2050. The analysis was conducted in two stages: First, changes in soil salinity for the period 2001-2009 were assessed using information recorded at 41 soil monitoring stations by the Soil Research Development Institute. Using these data, a spatial econometric model was estimated linking soil salinity with the salinity of nearby rivers, land elevation, temperature, and rainfall. Second, future soil salinity for 69 coastal sub-districts was projected from climate-induced changes in river salinity and projections of rainfall and temperature based on time trends for 20 Bangladesh Meteorological Department weather stations in the coastal region. The findings indicate that climate change poses a major soil salinization risk in coastal Bangladesh. Across 41 monitoring stations, the annual median projected change in soil salinity is 39 % by 2050. Above the median, 25 % of all stations have projected changes of 51 % or higher.

Effect of Salinity Intrusion on Food Crops, Livestock, and Fish Species at Kalapara Coastal Belt in Bangladesh

“…+ , and K + were found to be 300 ( S/cm), 1-2, 150-600, 250-400, 200, and 12 mg/l, respectively (Table 7). According to Dusgupta et al [1] thirty-nine (39) percent of salinity will be increased across the coastal belt in Bangladesh by 2050. The intensity and spread of this salinity across the coastal belt in Bangladesh were connected with the changes of sea level rise, temperature, and rainfall and altered riverine flows from the Himalayas [46].…”

“…Salinity intrusion is one of the major environmental issues throughout the world [1]. Bangladesh is a growing and developing country.…”

The Sustainability of Rice-Based Cropping Systems in Coastal Bangladesh: Bio-Economic Analysis of Current and Future Climate Scenarios

“…The model gives due consideration to river water salinity, annual flooding, water table infusion, precipitation, and temperature. Hence the assumptions used in the modelling reported here, while crude, are close to the subsequent predictions of Dasgupta et al (2015) and reflect the likely adverse trends.…”

“…In the modelling reported here, a 10% increase in soil salinity level over the next 15 years to 2030 was assumed, followed by a further 10% increase over the next 30 years to 2060 (Figure 10.3b). Since the completion of this analysis, Dasgupta et al (2015) employed an econometric model to project that soil salinity in Khulna will likely increase between 9-11% in 2030 and 26-33% in 2050 under low and high salinity scenarios. The model gives due consideration to river water salinity, annual flooding, water table infusion, precipitation, and temperature.…”

The AKT2 potassium channel mediates NaCl induced depolarization in the root ofArabidopsis thaliana

“…Salinity is a complex environmental factor to which land plants have been exposed for millions of years, and it currently represents a major threat to agriculture. 1 NaCl is a particularly dangerous salt; Na C competes with K C for its transport into root cells, but the ion channel(s) through which it enters remain(s) unidentified". Ion channels that catalyze the influx of K C ions into the cytoplasm, known as inward rectifiers, are good candidates as points of entry for Na C ions.…”