Due to urbanisation and industrialisation, water pollution is now one of the major environmental challenges of the twenty-first century. Considering the increasing of agricultural and non-agricultural settings in the last decades, the investigation of the relationship between such pesticides and urban stormwater is critical to understand how urban, residential, and industrialized areas can affect environmental safety. Recently, scientific interest has grown in stormwater chemical characterization with the aim to define its impacts in the environment and possibly to make it potable water. In this context, glyphosate, glufosinate and their degradation products have been identified as the key knowledge gap for the chemical characterization of stormwater. Research investments are needed for a better understanding of the highly polar pesticides to estimate their load, source, and dispersion of urban runoff due to residential use of herbicides. Furthermore, a more comprehensive study of wet and dry deposition and spray drift should be considered for a correct evaluation of source apportionment.
Response to Reviewers:Reviewer #1: Thank you very much for giving me the opportunity to review your paper. In general I find your work could be a valuable contribution to Water, Air and Soil Pollution journal A: Thank to Reviewer #1 for the comment. 1. Line 86. Add a table with the physical and chemical characteristics of these herbicides (glufosinate, AMPA and glyphosate): vapor pressure, solubility, adsorption coefficient, molecular mass, etc. A: We agree with Reviewer #1, we added a table with the characteristics of each target Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporation compound. We also better explain the degradation pathways of glyphosate (lines 83-86) as follows: "Glyphosate degradation processes in soil are mediated by microorganisms producing AMPA, sarcosine, and glycine (Figure 2). The first pathway involves C-N bond oxidation, with a consequent release of AMPA and glyoxylate. Another degradation pathway is possible through sarcosine oxidase, which leads to sarcosine and phosphate formation. Sarcosine is further processed to glycine (van Bruggen et al. 2018)." 2. Line 118. Abbreviations should be given in full name at their first appearance. EFSA? Table 1 LQO?A: Sorry for this. All the abbreviation are now given in full name at their first appearance.3. A variable to discuss would be the flow rate. The authors make this point (peaks line 209-211) but I think this variable needs to be addressed in their discussion of results. It is another variable to study in future research.It must be borne in mind that before studying the behavior of these pollutants, it is necessary to know the behavior of the water flow. A first step would be to apply the concepts of urban hydrology.A: Thank to Reviewer #1 for pointing it out. We carefully addressed the impact of flow rate and mobility of target pesticides (lines 226-236) as follows: "Overall, pesticides behaviour in urban catchments is poorl...
The growth parameters and age for the fish species from the lake (O. niloticus, S. galilaeus and B. bayad) were computed through interpretation of marks found on their Opercula bones which were then fitted into Vonbertallanfy growth model. Their asymptotic length (L∞) ranged from 175mm-520nm. The growth performance index Ф' ranged from 3.6622-4.9420 and K value from 0.10-0.35. O. niloticus L∞, K and Ф' values ranged from 175mm-192.5mm, 0.15-0.25, 3.6622-3.9668 and were found to live up to 7 + years in the lake. The values of S. galilaeus ranged from 200mm-240mm, 0.12-0.17 and 3.8211-3.8222 and living up to 5 + while B. bayad had a range of 500mm-520mm, 0.10-0.35, 4.4320-4.9420 and lives up to 6+ in the lake. All the growth parameters for the fish species were fitted into the Vonbertallanfy growth model. L t =L∞ (i-ek (t-t o)
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