Feasibility Studies of Rainwater Harvesting System for Ablution Purposes

Round 1

Reviewer 1 Report

The article is interesting, I believe that these observations can be included:

1) It is not clear why to employ these water quality parameters. It is not seen a direct and important contribution with these parameters.

 

2) An analysis of the climatological data should be done. It is not identified a rigor and academic depth with respect to this topic.

 

3) In the analysis of correlations, it is recommended to include the p-value as an indicator of correlation. On the other hand, the importance and contribution of this statistical analysis is not seen.

 

4) The references should be expanded. There are more and more new contributions.

 

 

Author Response

Please see Attachment

Author Response File: Author Response.pdf

Reviewer 2 Report

The paper describes a numerical model of rainwater harvesting system. The model is based on analysis of balance between incoming and outcoming water. Partial attention is paid also to quality of water.

The paper is written concisely and clearly. The numerical model is applied to existing place and corresponding input data are used to analysis. In my opinion, the weak point of the paper is part dealing with quality of water. The analysis does not cover sufficient time period (only two weeks do not seem to be enough). Quality of water could change in different parts of the year.

I would also recommend to include section on deeper explanation of weather conditions in Brunei and the evolution in time. By the way, time axis is somehow skipped in the whole paper.

Specific remarks follow.

Line 19: m2 should be written instead of m3.

First equation: all Qs should be in square brackets to prevent misunderstanding and Q_evap should have parameter (i) instead of (t).

Equation (1) and (2) have swapped numbering.

Coefficient C_roof should be explained better. I guess, it is a number in limits 0 and 1, but I there is not explanation how to get specific value.

It could be stressed that variable I(t) has units mm per meter square.

Equation (7): It looks like Q_rel is missing there.

Figure 1: Q_main is missing in the flow chart. It should be added or explained. Parameter T explained too late (in the next section).

Section 3.1. Is CO2 really the only (main) parameter influencing pH?

Table 1: Parts connected with Expt. 1, 2 and 3 should be clearly distinguished, maybe with a horizontal line. The table will be better readable then.

Author Response

Please see the attachment

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

The paper looks better now.

Author Response

Please see the attachment

Author Response File: Author Response.docx