Algae Growth Distribution and Key Prevention and Control Positions for the Middle Route of the South-to-North Water Diversion Project

Round 1

Reviewer 1 Report

General comment

It is a manuscript mainly focused on hydrodynamics and excessively empirical. A lot of physics but little biology. Nothing is said about the concentrations of nutrients in the different areas or their seasonal fluctuations. The floristic study is very poor, only two taxa were identified and nothing is known about whether this increase since 2106 in the algae of the canal could also be due to a floristic change that has been accelerated in recent years by some phenomena of "Global change" (introduction of alien species, eutrophication, climate change…). The amount of macrobenthic algae in the main canal and hydrodynamic conditions are correlated without taking into account other factors that could be decisive. It would be necessary to differentiate well which are zones of growth of the algae and which of accumulation of the same. It is very likely that benthic algae initially grow largely in areas of high flow due to greater renewal of nutrients. Later, algae can break into fragments due to the current and move on to live freely in suspension or on the bottom of the channel to finally accumulate in areas of less current or where the regimen of turbulence is changed, such as the beginning of the curves.

Other changes:

Line 65 “chlorella”           "Chlorella" (uppercase and italics)

Line 65 “Fibrillar algae”                  "filamentous algae"

Line 66 “Scenedesmus” and “Anabaena” in italics

Lines 70, 72 “Scenedesmus quadricauda” in italics

Line 94 “Mycrocystis” in italics

Line 95  “Diatoms” and “Green algae” not in uppercases

Lines 157-58 “…the main canal contained Epiphytic algae of the Cladophora genus[28], Cladophora belogns to Chlorophyceae and Cladophoraceae.    Replace by “…the main canal contained benthic algae of the genus Chladophora (Chlorophyta, Cadophorales) [28].”

Line 169 “Spirogyra communis, while the…”       replace by “Spirogyra communis (Charophyta, Zygnematales), while the …”

Lines 169-172: Delete “Spirogyra communis, a common eukaryotic organism, is green and belongs to conjugating algae, Spongyaceae and spongy plants; belongs to Chlorophyta, conjugating algae, binary algae, binary algae and spongy plants” This sentence is superfluous and meaningless.

Line 172 “Spirogyra communis were found…” replace by "Spirogyra communis is a green algae that was found…"

Lines 452, 453 and 454 “Cladophora” in italics

Lines 456-457 Delete sentence: “Similarly, when….where also produced” There is talk of Trichoderma, a fungi, without saying what it is and without prior reference…

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

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Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf