227
records. They considered more than 1000 rainfall gauging stations for generating
the observed datasets. This type of scenario is highly correlated between observed
rainfall data and traditional rainfall and runoff model. Ahmadi et al. (2017) estimated the flood frequency using power law methods with different types of probability distribution. The duration of flood series in different temporal period has been
worked out, and then the result has been compared with annual maxima. Finally,
they concluded that the annual maximum is not suitable in terms of the frequency
analysis and the monthly partial flood duration is more realistic which is derived
from the power law function. Farooq et al. (2018) estimated the flood frequency and
its magnitudes of Swat River using different techniques which is based on different
return period, such as 5, 10, 25, 50 and 100, and intimates that the simulation based
on different return period is very much useful in regarding the flood frequency.
Flood report from the Govt. of West Bengal (Irrigation and Waterways
Directorate, Government of West Bengal, 2015) shows that lower part of the eastflowing river is experiencing frequent flood and inundation like situation. In this
study, Ketugram-I and II C.D. blocks of Bardhaman district has been taken for the
study. These two blocks are located near the flood plain of Ajay River basin. Most
of the study in this region was done for identifying the spatial variation of the flood,
impact of LULC on flood susceptibility, flood inventory, causes of flood and so on.
In this study, the village and Mouza level flood affected and non-affected areas are
identified. The area is dominated by subsistence-based agricultural system and very
fertile in nature, so structural measures cannot be appropriate in this region for the
monetary problem as well as ecological disturbances. Here the non-structural measures like vegetative measures are suggested in various spatial units with keeping in
the view of the location of settlement and local environment. The main objectives of
the paper is to find out the flood frequency and its magnitudes using statistics and
GIS to estimate the Mouza level (small administrative unit) flood-prone areas and to
determine the possible way for escaping from this type of disasters by using the
sustainable measures those can be obtained from the knowledge of the local
stakeholders.
13.2 Study Area
This study area is located in the north-eastern part of the Bardhaman district which
is under Katwa subdivision, bounded by 23°37′29″N to 23°50′20″N latitudes and
87°54′15″E to 88°14′05″E longitudes. This study area (Fig. 13.1) covers an area of
354.01 square kilometres within which Ketugram-I block covers 193.98 square
kilometres and Ketugram-II block covers 160.03 square kilometres. This study area
is surrounded by three districts, namely, Birbhum, Murshidabad and Nadia districts.
The present study area belongs to the flood-prone area of Bardhaman district which
is mainly affected by two rivers Ajay and Bhagirathi. Ajay is one of the important
right bank tributary of River Bhagirathi, which is very much destructive during the
13 Flood Frequency Analysis and Its Management in Selected Part of Bardham…
records. They considered more than 1000 rainfall gauging stations for generating
the observed datasets. This type of scenario is highly correlated between observed
rainfall data and traditional rainfall and runoff model. Ahmadi et al. (2017) estimated the flood frequency using power law methods with different types of probability distribution. The duration of flood series in different temporal period has been
worked out, and then the result has been compared with annual maxima. Finally,
they concluded that the annual maximum is not suitable in terms of the frequency
analysis and the monthly partial flood duration is more realistic which is derived
from the power law function. Farooq et al. (2018) estimated the flood frequency and
its magnitudes of Swat River using different techniques which is based on different
return period, such as 5, 10, 25, 50 and 100, and intimates that the simulation based
on different return period is very much useful in regarding the flood frequency.
Flood report from the Govt. of West Bengal (Irrigation and Waterways
Directorate, Government of West Bengal, 2015) shows that lower part of the eastflowing river is experiencing frequent flood and inundation like situation. In this
study, Ketugram-I and II C.D. blocks of Bardhaman district has been taken for the
study. These two blocks are located near the flood plain of Ajay River basin. Most
of the study in this region was done for identifying the spatial variation of the flood,
impact of LULC on flood susceptibility, flood inventory, causes of flood and so on.
In this study, the village and Mouza level flood affected and non-affected areas are
identified. The area is dominated by subsistence-based agricultural system and very
fertile in nature, so structural measures cannot be appropriate in this region for the
monetary problem as well as ecological disturbances. Here the non-structural measures like vegetative measures are suggested in various spatial units with keeping in
the view of the location of settlement and local environment. The main objectives of
the paper is to find out the flood frequency and its magnitudes using statistics and
GIS to estimate the Mouza level (small administrative unit) flood-prone areas and to
determine the possible way for escaping from this type of disasters by using the
sustainable measures those can be obtained from the knowledge of the local
stakeholders.
13.2 Study Area
This study area is located in the north-eastern part of the Bardhaman district which
is under Katwa subdivision, bounded by 23°37′29″N to 23°50′20″N latitudes and
87°54′15″E to 88°14′05″E longitudes. This study area (Fig. 13.1) covers an area of
354.01 square kilometres within which Ketugram-I block covers 193.98 square
kilometres and Ketugram-II block covers 160.03 square kilometres. This study area
is surrounded by three districts, namely, Birbhum, Murshidabad and Nadia districts.
The present study area belongs to the flood-prone area of Bardhaman district which
is mainly affected by two rivers Ajay and Bhagirathi. Ajay is one of the important
right bank tributary of River Bhagirathi, which is very much destructive during the
13 Flood Frequency Analysis and Its Management in Selected Part of Bardham…