User talk:EvorLi/Glacial stream

I have finished reviewing your article. Keep up the good work! OMmachine (talk) 04:51, 3 April 2021 (UTC)

Suggestions for organization and content revisions for Glacial Meltwater Stream page
You have done a great job in putting together the Glacial Meltwater Stream page.

My suggestions to improve the content and structure of the page for the next version are as follows: 1.	Consider replacing the term “Glacial Stream” with the more common used terminology of “Glacial Meltwater Stream”, or “Glacier Stream”. 2.	Change all bullet point style to paragraph format 3.	See my suggestions for revising the different sections Glacial meltwater Stream Definition It would be excellent to add a schematic showing supraglacial, englacial, subglacial, and proglacial meltwater streams. Vera Chu has a nice schematic showing these formations in her paper on Greenland Ice Sheet melting https://www.researchgate.net/figure/Elements-of-the-Greenland-ice-sheet-hydrologic-system-a-In-the-accumulation-zone-above_fig1_265050040 that shows these melt formations and would add a nice visual representation to the Wikipedia page. https://www.researchgate.net/publication/265050040_Greenland_ice_sheet_hydrology_A_review. You might want to ask her for permission to use her schematic. https://www.researchgate.net/profile/Vena-Chu-2 The schematic will help you to write the glacial meltwater stream definition in the first paragraph as you could describe how the glacial meltwater originates and follow the glacial melt processes visually by narrating the schematic as the water flows over, in, under, and out from the glacier terminus. Also, the main focus of the glacial meltwater stream definition should be on the process of the ice melting and flowing due to gravity – the melting forms supraglacial, englacial, subglacial, and proglacial streams. Don’t forget proglacial meltwater streams. These are at the terminus of the glacier and the receiving stream of the glacier’s meltwater whether the meltwater originates from proglacial, englacial, or subglacial melt processes. Besides streams that flow from the upper surface of the glacier and through the glacier internally, there are also moulins which are vertical passageways that water can flow from the top to the base of the glacier. All of the water flowing on top, within, blow and out of the glacier flows into a proglacial meltwater stream (although sometimes a proglacial lake). These meltwater pathways are all a part of the proglacial meltwater stream which is beyond the glacier. Channel Formation section This section is focused on the erosional actions of the glacier on the valley and my suggestion is to refocus this section on the erosional impact of the fluvial processes (meltwater streams) and move the entire section to the “Stream Discharge” section. The movement of water (fluvial process) also moves sediment and causes denudation of the valley but what you are currently discussing is the action of the glacier itself on the valley. My suggestion is to remove the “Channel formation” section and discuss the effects of the stream discharge and erosional impacts to the landscape in the “Hydrology” section (currently named “Stream Discharge”). You can also discuss the impact of the glacier on the valley morphology but this should be a minor part as your topic is glacial meltwater streams. If there is a way to incorporate this Fox Glacier time lapse video it would demonstrate a lot of what you are trying to describe about the formation of glacial meltwater streams and the impact of glaciers on the surrounding geomorphology. https://blogs.agu.org/landslideblog/2015/02/15/fox-glacier-a-time-lapse-video-of-slope-failures-as-the-glacier-retreats/

Location section Please double-check and modify the first sentence for correctness regarding glacial-melt streams in catchments with “previous” glaciers. Glacial meltwater streams occur where there is a current ice glacier or a rock glacier. It seems that previous glaciers mean that there is currently no glacier whether it is a rock or ice glacier and therefore the streams should not be considered as glacial meltwater streams. https://eos.org/research-spotlights/glacial-meltwater-features-depend-on-glacier-type-and-location The rivers that you have listed are not all considered to be glacial-melt rivers. I would remove the Mississippi and Fraser Rivers and select two additional glacial meltwater headwater rivers that have good Wikipedia pages. Here is one example of a glacier meltwater river with a good Wikipedia description - https://en.wikipedia.org/wiki/Gangotri_Glacier

Stream discharge section Consider renaming the section "Hydrology of Glacial Meltwater Streams" Glaciers undergo diurnal cycles in discharge as well as seasonal patterns. This should be added to this section. See page 235 for a description of diurnal melt in glacial meltwater streams - https://link.springer.com/content/pdf/10.1007%2F978-90-481-2642-2_118.pdf Second sentence – does the hydrograph of a glacial meltwater stream peak in the spring? It seems that the hydrograph (discharge volume) peaks in the summer but is in an increasing phase during the springtime. I suggest changing this sentence and including a hydrograph similar to this one to show the readers the difference in annual hydrographs of different stream types: https://www.researchgate.net/figure/Characteristic-hydrographs-for-the-three-watershed-types-glacial-snowmelt-dominated_fig6_273133931

Ecology section In the first sentence it would improve the section to remove the verbiage, “but also the consistently contribution of melting snow” and merge the second sentence with the first.

The first sentence of the second paragraph should be removed as the study that you cited focused on only two taxa in multiple catchments in a particular geographic region. This study is not reflective of all macroinvertebrate growth patterns in glacial meltwater streams and in general the colder the water temperature, the slower the growth rate of the invertebrates inhabiting glacial meltwater streams in comparison with warmer temperature streams. My suggestion for this paragraph is to remove the first two sentences and follow the J.V. Ward “Ecology of Alpine Streams” paper as the general guideline to describe the macroinvertebrate communities found in glacial meltwater streams. You might discuss the kryal sections of a glacial meltwater stream (metakryal and hypokryal zones) and the typical fauna and flora found in these zones. You might also mention that kryal sections of a glacial meltwater river are typically < 4oC to give the reader an idea of the low temperature of the waters.

Human Impacts Section Remove the final sentence regarding sediments burying organisms. This seems like a stretch. Overall you have done a nice job improving the glacial meltwater stream page! Keep up the good work. Himalopsyche (talk) 02:11, 15 April 2021 (UTC)