Aamir Alamgir

Vulnerability to climate change of surface water resources of coastal areas of Sindh, Pakistan

AbstractThe coastal district Thatta of Sindh Province is the area where availability of freshwater is a critical factor for the human survival and livelihood. As such, there are no perennial surface water resources available in the district except of River Indus and its canal system. In view of the changing climate change scenario of the coastal areas of Sindh, this study was undertaken to determine the availability and quality of surface water available in Thatta district. Results of the present investigation indicate that the water from the canals was not suitable for drinking as per WHO guidelines and National Standards for Drinking Water Quality Pakistan. Agriculture run-off, sewage leaks and metals quite often contaminate the surface water resources. However, users have no method to judge its quality except for the taste. Thus, most of the residents drink polluted water unknowingly, and do not question its quality. Increasing variability in rainfall pattern and reduced flow in the River Indus at down...

Estimation of Environmental Pollutants in Vegetables

ABSTRACT The Karachi area is drained by two major river basins used for dumping solid, industrial, agricultural, and domestic waste. The banks of the rivers are used for agricultural purposes and crops irrigated by contaminated river water. The industrial and domestic wastewater contains pollutants that are toxic to environmental and human health. Microbial loads and toxic heavy metals were determined in vegetables grown in the area. High levels of total coliforms count were found in lucerene (Portulaca oleracea L), amaranthus (Amaranthus spp. L.), and spinach (Spinacia oleracea L.) as well as chilies (Capsicum annum L.). Total fecal coliforms were highest in amaranthus, maize (Zea mays L), and gourd (Lagenaria siceraria L). Total fecal streptococci count were high in spinach, maize, and okra. Low levels of bacteria were found in bitter gourd (Momordica charantia L.), luffa (Luffa cylindrica L.), and gourd. There was no Cr and Cd in samples; Cu concentration was highest in beetle leaf (Piper betle L.) and spinach and lowest in luffa. Lead was highest in lucerne and spinach and lowest in bitter gourd. Nickel concentration was highest in okra (Abelmoschus esculentus L.) and beetle leaf and lowest in luffa. Regardless of vegetable tested, none were considered safe for consumption based on levels of toxins and/or bacteria.