---
title: Designing Rainwater Harvesting Pond
description: "# **RWH** Click Add in Project View to create a new MSMA project. Choose RWH, select MSMA 1^st Edition, create the name of the project, and click Create.  ![](https://lh6.googleusercontent.com/WZ0SuOFrxxAZx94l-RaaNeZwT5745nn8QAU9XaFRkDkYg5xrztLA7AqUObwfv0l84QVTGEZAsjgCCdMYc9X8AbzUOiz9cPN0Y78bpM_RnHRWlaThg9s8f4zaYp5Sge-2wKUtbWNgwWa6eFVRRXhi8Nq2PlytBhP_iCYwbSBLiqjD54ePK1O3iqjI) ## **Rainfall Data** Determine the average yearly rainfall by inputting the…"
url: "https://mes100.com/docs/designing-rainwater-harvesting-pond-msma-1st-edition/"
updated: "2026-10-03"
category: MSMA / MSMA 1st Edition
---

# Designing Rainwater Harvesting Pond

# **RWH**

Click Add in Project View to create a new MSMA project. Choose RWH, select MSMA 1^st Edition, create the name of the project, and click Create. 

![](https://lh6.googleusercontent.com/WZ0SuOFrxxAZx94l-RaaNeZwT5745nn8QAU9XaFRkDkYg5xrztLA7AqUObwfv0l84QVTGEZAsjgCCdMYc9X8AbzUOiz9cPN0Y78bpM_RnHRWlaThg9s8f4zaYp5Sge-2wKUtbWNgwWa6eFVRRXhi8Nq2PlytBhP_iCYwbSBLiqjD54ePK1O3iqjI)

## **Rainfall Data**

Determine the average yearly rainfall by inputting the average monthly rainfall from January to December.

![](https://lh6.googleusercontent.com/K8aRV8UPPgQAPGQVLujBV45R_T7UTKQo7T1ntTLPfXT50-FbVH8ZcU_q_De5VqRndJ1DblEbPyB2RKqfr401aRVioiWxidb0J-86lJl-6BEM5CUwT6WN8zYPBsA53ZI0I3lbgkU5g2OHPWoPg_4xhmCWkLWD7C1S2uVxP3H0yPOlPWaGZQ-s4AQw)

## **Harvested Rainfall**

Determine the amount of harvested rainfall by inputting data in the Harvested**Rainfall** tab.

![](https://lh5.googleusercontent.com/AxNlrDXxGX-MAja1yeKZcM__xDmRZdKVlvq9x1punlaRX8uf_R9ADkrerYpLaI8H_YrWgmCv-IIVmzhTdr5l2MibDonEXJvDz4MfuRgzx2UA29LZfzssCCVkhsnJFGdlFnkAEi_EQ-MDQUvg1bO3FtNRInmZzhr-7bcu7useqklH2JL62bXf1FEp)

1. Input the plane area of rooftop catchment, impervious pavement catchment, and/or landscape catchment.

1. Input the runoff coefficient of rooftop catchment, impervious pavement catchment, and/or landscape catchment.

1. Click on the “ **Calculate**” button to obtain the harvested rainfall from different types of catchment areas and total yearly harvested rainfall.

## **Water Demand**

Determine the amount of water demand by inputting data in the Harvested**Rainfall** tab.

![](https://lh6.googleusercontent.com/kY6K2MlteddRci04QDx1dcapIZMRWCJC1wxNQu1gYbBkiv-cvQOn511si9kAT3RKtb8nLo0DmkT16HPtrYDI5UiFdcooyeHHu6NM94QqcXSJa9ES5mIbVufAax2Np4ULkMYGhnXrkeao0BgqrYelHTsU1JPGe03z5UuQQQeYxmhiAUqWedVfVlC4)

1. Choose the Appliance (outdoor/indoor).
2. Select the Unit.
3. Input the Frequency of Use.
4. Click on “ **Calculate**” to obtain average water demand and required tank storage.

## **Tank Sizing**

Design tank volume by inputting data in **Tank Sizing** tab.

![](https://lh6.googleusercontent.com/xsVYJzuDq8ZjKeBzFx9T2XAWhFlSlTTOZWEivycbarSFiO-C9pcf06BkQExONqJcXRuA_VZEPDtkPtgvNLpqM9YScV7wzPVT99cGtFWiTew_I411KX6Lz2HkwT-7OI3j7NtfzNqUeE29dSWrcd_M_ztTiWvnMiuomRgGl-S9UFWjY4CNmnF4Kcab)

1. Select the type of the tank.
2. Input the dimension of the pond design.
3. Click the “ **Calculate**” button to obtain Tank Storage.

## **Result**

Click the “ **Analyse”** button to generate the results.

![](https://lh6.googleusercontent.com/UnQ16GGDo1VUaVtqZNsB6ibpoD1cdyuV8Ph4r4XlLHCxo2rvqB8_07ukeH-HFxKqjid-Az-iDU7WZ3BjEqh1amOE3OgGGJzjht7zUb2JOfm4Y6ENk_jPGIzvUHPEGP9bfAbUq3WOI1DUEWoM2R2SC964ZugISBkTqcA1ERx46ravjSDX7h6AgpPp)

Click **Textual Report**, **Summary Report,** or **Graph** tabs to show the outcomes respectively.

![](https://lh5.googleusercontent.com/XMbBa-QWnjQXsYpUtMJrCkWjoXkdMOfEyv4sDxTBpmKebEU6Kmb4MKCU9MJhpAXBQ8za1rxSjJO37UEpmOnGfdWZoAxb-l27hIKHVgOYx5i_WuoomgjO7CuyejqwsS6PMVhUT47rBRYIe-ezU0J7iwGDDEERnT-2J1k75zFlW8bYWHtXgC2YQEK0)

### *Related*

 [![](https://i0.wp.com/mes100.com/wp-content/uploads/2024/10/me-small.jpg?resize=100%2C100&ssl=1)](https://mes100.com/author/admin/)[Ngu Soon Hui](https://mes100.com/author/admin/)

I’m the [Benevolent Dictator for Life](https://en.wikipedia.org/wiki/Benevolent_dictator_for_life) for MiTS Software cum Editor of this website. Read more [here](/about-ngu-soon-hui/).

You can also contact me at soonhui@mes100.com