May be you can carry out  this with  Land sureface models (LSM), such as CLM et al. Of  course, you need prepare some forcing data and surface data by yourself.

For landuse impact, you can check my paper "Impacts of land use and water quality on macroinvertebrate communities in the Pearl River drainage basin, China" - Hydrobiologia 09/2010; 652(1):71-88. https://www.researchgate.net/profile/Yixin_Zhang3/publications?sorting=newest&page=2

My method in the paper may be relevant to your question.

In this regards you need a satellite images pre and post flooding/surface runoff in a particular area.

Quantify: you can calculate the damaged area by over lay analysis in vector layers or raster image of pre and post event.

The amount of severity and level of damage you have to do the inventory survey.

I am waiting for one of my publication to get published soon then share with you and hope that particular paper will solve your concerns. Please wait for some time. However, I am attached the abstract for your information.

the main impact of land use/cover is related to runoff coefficient or curve number. You need to quantify the change in this parameter as related to LU/C change. you also need a soil map. Combine (intersect) soil map with LU/C and derive a map of land use/cover-hydrological soil group (LUC-HSG).  Use the same procedure for the second time period (land use at t2) and study the change. In ArcGIS, you can use raster calculator to build up the calculations.

There are two major steps you need to follow in a study like this. The first step is to carry out a Land use/Land cover and Change detection analysis, making use of multidate satellite data. The second step is to carry out a mophormetric analysis, this will require elevation data such as SRTM or DEM as the case may be. You can then combine all these data for spatial analysis in the ArcGis software.

I have done something similar to what you want to do, if you want to work with just observation data you should have at least 50 years of rainfall and runoff data, they should have the same trend, if they do not that could be a sign of land use changes, you could detect it with wavelet analysis.

Hi Gopal. Read my paper " Developing change spectra..." or " Hydroclimatic shifts driven by water use for food and energy production" to do that in an easy way. Good luck.

climate Change and surface change can be measured or quantify up to some extant. For this you can go through our  publications from the webpages of ICRISAT. For Example: Empowerment through Enrichment. and Participatory Crop Improvement in Eastern India. and Wealth Generation through Chickpea Revolution. or more

If you have stream discharge data before and after the landuse changes, you can use the Richards-Baker flashiness index (R-B index, http://www.appliedeco.com/Projects/flashiness.pdf). The R-B index can be used to quantify changes in the streamflow as affected by changes in land and water management.

Thank you all for you great support.

As Jawad T Al-Bakri has written, you must specify the Curve Number(CN). The CN obtains from the overlaying 2 layers land use and soil hydrological groups. Using the table SCS determine hydrological condition (CN) on the basis of soil moisture 5 days before rainfall. Then do the calculations of runoff or flooding

The SCS-CN methodology is widely used. As previous collegues wrote you need the following:

- soil hydrological groups

- land use categories

- tables with CN values (available e.g. in the works of Chow VT (1964) Handbook of Applied Hydrology. McGraw-Hill Book Company, New York or Urban Hydrology for Small Watersheds (TR-55). Natural Resources Conservation Service, Washington)

- define designed rainfall or measured rainfall

- define Antecedent Moisture Condition (AMC) 5 days prior to designed rainfall or measured rainfall and modify CN values according to AMC I, II or III

- use e.g. ArcGIS and HEC-GeoHMS extension to create CN-grid

- them you can create rasters of potential retention, surface runoff depth, contributing areas, surface runoff volume, etc. according to the formulas presented e.g. in the cited works

- compare the results for different time horizons with relevant land use

- you can quantify changes using map algebra in ArcGIS

Hi Gopal

a bit late but I hope still useful

It is how we didi in our Sahelian area.

best

Gil

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Hi there,

To understand land use land cover impacts on flood ( Runoff). You have to use the Curve Number (CN), so the most method is SCS-CN.

Although most of the esteemed colleagues above have commented on the CN method, I think it is worthwhile to use a Physically-based hydrological model if you have good land cover data. It may give you additional insight.