Wearing headlamps and crampons supplied by Overland Trekking, we gingerly make our way through the frozen canyon along a solid ice river bed to frozen waterfalls suspended in the air like clusters of icicles.
An essential aspect of eutrophication studies is to trace the ultimate origin of phosphate ions (P-PO4) associated with the solid phase of river sediments, as certain processes can make these ions available for algae.
Our most recent work showed that the total dissolved solid (TDS) of river waters during the wet period are much higher than during the dry period, suggesting that the chemical weathering is much stronger during wet period than during dry period [9].
The concentration of suspended solids found in river samples is 77.6 mg/L, which is an indicator of soil erosion from the watershed.
High EC towards the east is due to accumulation and increase in the dissolved solids in the river, which recharges the groundwater.
Upstream of the fifth site, there is a sand-mining site which deposits suspended solids into the river, thereby being a possible cause for the decrease of the MMI from class 1 to 2. Sand mining affects water ecological quality through contamination with increasing dissolved and suspended materials.
Arab historians of the 12th century described Ahwāz as the centre of a large sugarcane- and rice-growing area irrigated by a system of great canals from a dam constructed across the river on solid rock.
Up to 98 percent of the water from the industrial process would be recycled, though some of the seepage would be discharged directly into the river, after solid particles are clarified.
Movement of the solid load down a river valley is irregular, both because the streamflow is irregular and because the transported material is liable to enter temporary storage, forming distinctive river-built features that range through riffles, midstream bars, point bars, floodplains, levees, alluvial fans, and river terraces.
These pictures, for all their physical energy, have a strange bent toward abstraction, whether in the huge undifferentiated mass of paint with which Bellows represented a sheer rock face beside the riverbank or in the solid blackness of the river itself.
