IAPRS & SIS, Vol.34, Part 7, "Resource and Environmental Monitoring", Hyderabad, India, 2002
CHARACTERISATION OF GULLY EROSION IN SELECTED CATCHMENTS OF
SUBMONTANE PUNJAB, INDIA
S S Kukal*, G S Matharu
Department of Soils,
Punjab Agricultural University, Ludhiana-141 004, India
sskukal @rediffmail.com
KEY WORDS: Gully erosion, Submontane Punjab, Gully density, Gully texture, Catchment shape
ABSTRACT:
A study was planned to observe the behaviour and pattern of gully erosion in selected catchments of in submontane Punjab. Three
adjoining catchments at village Saleran (district Hoshiarpur) were selected for characterization of gully erosion. These catchments
differed in their size, shape, slope and vegetation status and were designated as Catchments I, II and III. The landuse of the
catchments comprised of pasture, forest and wastelands. A detailed gully erosion survey was undertaken in these catchments and
gullies were marked on contour maps having scale of 1:1000. Gully density varied from 28.1 to 54.6 km km. Gully texture in the
three catchments ranged from 1629 to 4423 gullies km? with trend similar to that of gully density. Catchment III being more
compact with maximum value of average slope and highest soil erodibility was severely affected by gully erosion. In all the three
catchments, gully number decreased with increasing order of the gullies. Gullies were nearly equally distributed on either side of the
main gully in catchment I and III. Gully length was slightly higher on the southwest facing side than on northeast facing side in all
the three catchments. The first-order gullies constituted the highest percentage of the total gully length followed by second-order
gullies. The mean length of the gullies in general increased with increasing order of the gullies. In catchment I, 49.2 per cent of the
total length of the main gully represented third-order while in catchments II and TII, 81.5 and 91 per cent of main gully represented
fourth-order.
*Corresponding author: Dr S S Kukal (sskukal Grediffmail.com)
INTRODUCTION
Gully erosion is the most prevalent type of water erosion and is
responsible for damaging agricultural and residential land,
causing environmental degradation through downstream
sedimentation. On marginal farmland gully erosion is a major
source of soil and associated nitrogen and phosphorus losses
(Sharpley et al 1996) and thus reduces the crop yields
significantly. Severe gully erosion is attributed to high soil
erodibility, steep and long slopes and sparse vegetation cover.
Various factors such as man-induced anthropogenic factors
including deforestation, over-grazing, burning, sand mining,
faulty drain outlets and physiographic factors (Meyer and
Martinez-Casasnovas, 1999) including rainfall, vegetation
cover, landform, landuse and lithology affect gully erosion
considerably (Lal, 1992).
Planning for soil conservation, food production and
environmental preservation requires methods to estimate the
magnitude of gully networks, which come from detailed field
investigations and aerial photographs taken at periodical
intervals. Therefore, understanding of gully morphology and
behaviour is very much necessary for efficient planning
strategies. Gully erosion, although a serious problem in
submontane Punjab (Kukal et al 1991), yet virtually no work
exists regarding gully patterns and behaviour in the area. Quite
often expensive soil conservation measures fail to check gully
erosion (Kukal et al 2002) in the area due to lack of knowledge
about the pattern and behaviour of gullies and for not
recognizing the factors responsible for gully erosion in the area.
Keeping these points in view, a study was conducted in the
region to characterize gully erosion in selected catchments of
submontane Punjab with respect to their behaviour and
patterns.
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MATERIALS AND METHODS
The study was carried out in three catchments in village Saleran
(district Hoshiarpur) situated 31° 36 N’ latitude and 75° 59° E
longitude and 350 m above the mean sea level. The area
exhibits Shiwalik deposits which are alluvial, derived from sub-
aerail wastes of the mountains swept down by seasonal streams
and rivers. These are composed of gray and hard sandstones,
siltstones and red and purple shales along with pseudo-
conglomerates of middle Miocene to Helvetian age. Soils on
shoulder slopes and toe slopes lack any pedogenic
development, except and ochric epipedon, and qualify as
Entisols (Typic Ustorthents). The moderately developed soils
from back slopes and foot slopes are Inceptisols (Typic
Ustochrepts) whereas the young and stratified soils from
rivulets qualify for Psamments and Typic Ustipsamments.
The area has a sub-humid climate with annual rainfall varying
from 800-1100 mm, of which about 80 per cent is received
during summer monsoon months (July-September) and the
remaining during the winter season (October-March). Summer
rains are received in 20-30 rainstorms of which 10-12 are
runoff producing and a few occur with an average intensity
greater than 120 mm h''. The mean temperatures are 31°C in
summer and 14.9°C in the winter season. The soil temperature
is hyperthermic and soils have an ustic moisture regime
according to soil taxonomy (Soil Survey Staff, 1975).
The three selected catchments differed in their size, shape and
were installed with stage level recorders. A detailed field
survey for gully erosion was carried out in these catchments,
which were divided into grids of 50 m x 50 m on a contour map
of scale 1: 1000. Each gully line was sketched on the map by
measuring the distance from the wooden pegs laid out in the
grids. Vegetation status in terms of tree, bush and grass cover
was recorded in 100, 10 and 1.0 m? sub-grids. The areal, length