Page 1
Land Resource Inventory of Karekal-1 Micro-watershed for Watershed Planning and Development
Shorapur Taluk, Yadgir District, Karnataka (AESR 6.2)
ICAR - National Bureau of Soil Survey & Land Use Planning, BangaloreWatershed Development Department, Govt. of Karnataka, Bangalore
University of Agricultural Sciences, Raichur
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UAS Raichur, an exclusive University for
Agricultural Science for Hyderabad-Karnataka (H-K) region,
owing to inimitable climatic conditions and farming activities.
The H-K region comprising Bidar, Kalaburgi, Raichur, Bellary,
Koppal and Yadgir districts (Map), an agrarian area with an
irrigation potentiality of 12 lakh hectares through
Tungabhadra, Krishna, Karanja, Mullamari, Hirehalla,
Bennethore and other irrigation projects, spanning a total
geographical area of 44.96 lakh hectares accounting 33.60
per cent of the geographical area of the state, of which
nearly 68 per cent is under cultivation and has a unique
combination of medium (32.42%) and large farmers
(36.69%). University of Agricultural Sciences, Raichur peruses
the needs of Agricultural education to sensitize the farming
community with scientific innovations, short and long terms
way outs for the tribulations faced by the farming community
through Research for growth and sustainability of agriculture
sector and outreaching the technologies to uplift the socio-
economic status of the farming community through strong
Extension linkages. Thus “Greening the life of farming
community through Education, Research and Extension” is
set as the motto.
Citation: Land Resource Assessment of Karekal- 1 of Shorapur Talukof Yadgri District for Integrated Development under Sujala-III Project.
UAS, Raichur Tech. Bull.no.
TO OBTAIN COPIES OF THIS BULLETIN,
Please write to:Director of Research,University of Agricultural Sciences, RaichurRaichur Post Box No: 329, UAS CampusLingsugur Road, Raichur-584 104, Karnataka (India)
Phone : 08532-220154Telefax : 08532-220181E-Mail : [email protected]
Lead Scientist,RS & GIS Lab, SUJALA-III ProjectUniversity of Agricultural Sciences,Raichur-584 102, Karnataka (India)
Phone : 08532-220119E-Mail : sujala3uasr@gmailcom
About USA,Raichur
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Chapter Page Chapter Page
Contributors i 6.Land Suitability for Custard Apple 18
How to read and use the atlas ii 6.1.Land Suitability for Guava 19
Physical, Cultural and Scientific symbols used iii 6.2.Land Suitability for Jamun 20
6.3.Land Suitability for Mango 21
1.Introduction 1-2 6.4.Land Suitability for Sapota 22
2.General Description of the Micro-watershed 3-8 7.Soil & Water Conservation Plan 23
2.2.Climate 4 9.Proposed Crop Plan (Table) 24-25
2.3.Geology 5 10.Water Budgeting 26-27
2.4.Satellite Image 6 11.Conclusion 28
2.5.Cadastral map 7
3.Survey Methodology 8
4.The Soils 9-10
4.1.Soil Map Unit Description 10
5.Soil Survey Interpretations 11-17
5.1.Soil Depth 11
5.2.Surface Soil Texture 12
5.3.Soil Gravelliness 13
5.4.Slope 14
5.5.Soil Erosion 15
5.6.Land Capability Classification 16
5.6.1.Land Irrigability Classification 17
5.6.2. Hydrological soil Classification 17
5.6.3. Soil irrigability Classification 17
CONTENTS
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Contributors
i
Dr. U. Satish Kumar
Lead Scientist & HOD of Soil & Water Engineering
College of Agriculture Engineering
UAS, Raichur-584102
Mr. Rajesh N. L.
Lead Scientist
KWDP-II, Sujala-III, Agri. College
UAS, Raichur-584102
Field Work, Mapping & Report Preparation
Dr. U. Satish Kumar Dr. M. G. Kulkarni
Mr. Rajesh N. L.
Field Work
Dr. U. Satish Kumar Sh. Basavantaray Biradar
Dr.H.V. Rudramurtha Sh. Hanumesh
Sh. Y.Dharmaraj
Sh. Vinod Kumar
Sh.Yogish Nayak
Sh. Nilesh .R.Biradar
Sh. Shivaraj
Sh. Sunil Kumar
Sh.Ramesh
Sh.Venkatesh
GIS Work
Mr. Rajesh N. L. Smt. Chandralekha
Sh. G. Prabhudev
Sh. Veeresh
Sh. Ambika Balram
Sh. Deepika S
Sh. Jitendra Jegrakal
Sh. Shivraj Karjollmath
Sh. Ambika
Laboratory Analysis
Mr. Rajesh N. L. Smt. Sridevi
Dr. U. Satish Kumar Sh. Vinod Kumar
Sh. Ramkrishna
Page 5
Socio-economic Analysis
Dr. B. S. Reddy Sh. Mallinath Hemadi
Smt. Laxmi Seelin
Sh. Babasha Naikodi
Sh. Santosh Saibanna
Sh. Narayan Sakare
Soil & Water Conservation
Dr. U. Satish Kumar Sh. Ramesh Challagi
Sh. Sarfaraz
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The Land Resource Inventory of Karekal -1 micro-
watershed (Shorapur taluk, Yadgir district) for Watershed Planning (AESR
6.2) was undertaken to provide comprehensive site- specific cadastral
level information useful for farm level planning and integrated
development of the area under Sujala – III, Karnataka Watershed
Development Project- II.
This atlas contains the basic information on kinds of soils,
their geographic distribution, characteristics and classification. The soil
map and soil based thematic maps derived from soils data on soil depth,
soil gravelliness, slope, land suitability for various crops and land use
maps are presented on scale. The maps of fertility status (soil reaction,
organic carbon, 1:17,000 available phosphorus, available potassium,
available sulphur, Exchangeable calcium, available copper, available
manganese, available zinc, available iron, available nitrogen
,Exchangeable magnesium and salinity (EC) on 1:17,000 scale were
derived from grid point sampling of the surface soils from the watershed.
The atlas illustrates maps and tables that depict the soil
resources of the watershed and the need for their sustainable
management.
The user, depending on his/her requirement, can refer
this atlas first by identifying his/her field and survey number on the
village soil map and by referring the soil legend which is provided in
tabular form after the soil map for details pertaining to his/her area of
interest.
The atlas explains in simple terms the different kinds of
soils present in the watershed, their potentials and problems through a
series of thematic maps that help to develop site-specific plans as well as
the need to conserve and manage this increasingly threatened natural
resource through sustainable land use management. The Land Resource
Atlas contains database collected at land parcel/ survey number level on
soils, climate, water, vegetation, crops and cropping patterns, socio-
economic conditions, marketing facilities etc. helps in identifying soil and
water conservation measures required, suitability for crops and other
uses and finally for preparing a viable and sustainable land use options for
each and every land parcel.
For easy map reading and understanding the information
contained in different maps, the physical, cultural and scientific symbols
used in the maps are illustrated in the form of colors, graphics and tables.
How to read and use the Atlas
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iii
Each map in the atlas sheet is complemented with the physical, cultural and scientific symbols to facilitate easy map reading.
Physical, Cultural and Scientific symbols used in the Atlas
Inset map
Inset provided in each map conveys its
strategic location i.e. Taluk, Sub-watershed
and Micro-watershed.
Map title
Map title conveys the relevance
of thematic information
presented along with a
graphical scale, geographical
location and watershed details in
text form.
Legends and symbols
Two legends accompany each map, a map
reference, which depicts geographic
features and a thematic legend which
portrays spatial information. Picking up
the symbol and colour enables one to go
to the legends to obtain the required
information.
Map colours
Different shades of colours are used
as an aid to distinguish the different
classes of soils, crop suitability and
other maps.
Map key
There are many thematic types to be
differentiated on the map solely based
on colour. Therefore soils and suitability
types and their limitations are
distinguished by colours with a
combination of alpha-numeric
characters.
Soil Units
The soil map may be read at different
levels. The most detailed level is that of
the soil phase. Soil phases are
distinguished within soil series mainly
based on differences in surface soil
texture, slope, gravelliness, erosion etc.
Land Management Units (LMU)
Grouping of similar soil areas based on their
soil-site characteristics into management
units that respond similarly for a given level
of management are designated as land
management units.
Soil and plot boundaries
Soil units shown on the map are
represented by both the color and a
numeral. The soil boundaries are
superimposed on land parcel with
revenue survey number boundaries
to visualize its spatial extent.
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LAND RESOURCE INVENTORY OF KAREKAL-1 MICRO-WATERSHED FOR WATERSHED PLANNING AND DEVELOPMENTSHORAPUR TALUK YADGIR DISTRICT, KARNATAKA
A pilot study by UAS, RAICHUR
Land is a scarce resource and basic unit for any material
production. It can support the needs of the growing population, provided they
use land in a rational and judicious manner. But what is happening in many
areas of the state is a cause for concern to anyone involved in the management
of land resources at the grassroots level. The area available for agriculture is
about 51 per cent of the total area and more than 60 per cent of the people are
still relying on agriculture for their livelihood. The limited land area is under
severe pressure due to increased population pressure and competing demands
of various land uses. Due to this, every year there is significant diversion of farm
lands and water resources for non-agricultural purposes. Apart from this, due to
lack of interest in farmers towards farming, in many areas, large tracts of
cultivable lands are turning into fallow and this trend is continuing at an
alarming rate.
Further, land degradation has emerged as a serious problem and
this has already affected about 38.0 lakh ha of cultivated area in the Karnataka
state. Soil erosion alone has degraded about 35.0 lakh ha. Almost all the
uncultivated areas are facing various degrees of degradation, particularly soil
erosion. Salinity and alkalinity (>3.5 lakh ha) has emerged as a major problem in
the irrigated areas of the state. Nutrient depletion and declining of productivity
is common in both rainfed and irrigated areas. The degradation is continuing at
an alarming rate and there appears to be no systematic effort among the
stakeholders to contain this process. In recent times, aberrations of weather
due to climate change phenomenon have added number of additional
constraints and unpredictable situations to be tackled by farmers.
In this critical juncture, the challenge before us is not only to
increase the productivity per unit area, which is steadily declining and showing
a fatigue syndrome, but also to prevent or at least reduce the severity of
degradation. If the situation is not reversed at the earliest, then the
sustainability of the already fragile crop production system and the overall
ecosystem will be badly affected in the state.
The continued neglect and unscientific use of the resources for a long time has
led to the situation observed at present in the state. It is a known fact and
established beyond doubt by many studies in the past that the cause for all
kinds of degradation would be neglect and irrational use of the land resources
that exists at the grassroots level across the state. So any initiative to solve the
problems faced by these areas should also start at that level only. This alone will
help in evolving a rational, site-specific and viable land use options suitable for
each and every farm. To achieve this, we need a detailed site-specific farm level
database on various land resources for Karekal -1 in a time bound manner.
The database required for Farm-Level Planning can be obtained by carrying
out detailed characterization and mapping of all the existing land resources like
soils, climate, water, minerals and rocks, vegetation, crops, land use pattern,
socio-economic conditions, infrastructure, marketing facilities and various
schemes and developmental works of the government. From the data collected
at farm level, the specific problems and potentials of the area can be identified
and highlighted, conservation measures required for the area can be planned
on a scientific footing, suitability of the area for various uses can be worked out
and finally viable and sustainable land use options suitable for each and every
land holding can be prescribed to the farmer and other land users of the area.
The Detailed soil survey and Soil Resource Mapping carried out at 1:17,000
scale. This study aims to provide site specific database for the Karekal -1 ,
Shorapur taluk, Yadgir district under Under World Bank assisted Karnataka
Watershed Development Project, Sujala –III for Integrated Development. The
database was generated by using cadastral map of the karekal-1 as base along
with IRS and Google imagery. The objectives of the land resource survey, carried
out in Karekal-1 covering an area of 782.81
INTRODUCTION
To be continued….
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2
The objectives of the land resource survey, carried out in the karekal -1 micro-watershed covering an area of 782.81 ha during
April - May 2015 are indicated below.
Detailed characterization of all the land resources like soil, water, land use, cropping pattern and other
facilities available at parcel level in the Karekal-1.
Delineation of homogeneous areas based on soil-site characteristics into management units.
• Collection and interpretation of climatic and agronomical data for crop planning.
Socio-economic study for identification of factors affecting crop production
Assessment of the suitability of land resources for various crops and other uses.
• Identification of problems and potentials of the area and strategies for their management.
• Assessment of the suitability of land resources for various crops and other uses.
Establishing level digital Karekal-1 land resources database in a GIS framework.
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karekal -1 micro-watershed ( Shettiger sub-watershed, Shorapur taluk, Yadgir district) is located in between 16 23’12 – 16 25’37 North latitudes and
76 19’39 – 77 21’42 East longitudes, covering an area of about 783 ha, bounded by Maskanal, Nagur, Bopargi, Hagaratgi and uppaldinni villages.
LOCATION AND EXTENT
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Climate
Annual Rainfall : 680 mm. in the Karekal 1 Kodekal, Yadgir Taluk, Yadgir District
Source: KSRSAC,Bangalore
Length of Growing Period (LGP) is from August 1st Week to 2nd week of November (100-120 days)
Kodekal Hobli, Yadgir Taluk
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
mm
Weeks
PET
0.5PET
Rainfall
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Geology
GEOLOGY - KARNATAKA STATEKarnataka forms part of the
Peninsular Shield, which is an ancient stableblock of the earth’s crust. The shield iscomposed of geologically ancient rocks ofdiverse origin. These rocks have undergonevarious degrees of metamorphism andcrushing. Overlying these ancient rocks areProterozoic,lete Creteceous to Palaeocene,Palaeocene to Recent, and Recentsediments.
In the stratigraphic succession of rocksin Karnataka the Archaean group is theoldest, followed by Proterozoic, Mesozoicand Cainozoic formations.
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Traversing the watershed using cadastral maps and imagery as base
Identifying landforms, geology, land use and other features
Selecting transects representing land units
Opening profiles to 2 m depth
Studying soil and site characteristics
Grouping similar areas based on their soil-site characteristics into land management units
Preparation of crop, soil and water conservation plan
Socio-economic evaluation
The required site and soil characteristics are described and recorded on a standard proforma by following the protocols and
guidelines given in the soil survey manual and field guide. Collection of soil samples from representative pedons for laboratory
characterization and collection of surface soil samples from selected fields covering most of the management units for macro and micro-
nutrient analysis is being carried out ( 250m grid intervals). Further processing of data at chemical lab and GIS lab are carried out to
generate various thematic maps for each of the study area.
SURVEY METHODOLOGY Sequence of activities in generation of LRI
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Soil_No Soil_Phase Description Area_ha Per_Area
1 DNImC3g0 Dhoni, Deep(100-150 cm), non gravelly, clay, gently steep to steep sloping (3-5%),
Severe erosion. 93 11.86
2 KARkB2g1Karekal, Deep(100-150 cm),gravelly, clay loam,Very gently steep to steep sloping (1-3%),
Moderate erosion. 16 2.11
3 KARmB2g0Karekal, Deep(100-150 cm),non gravelly, clay,Very gently steep to steep sloping (1-3%),
Moderate erosion.
458 58.51
4 NGBmB2g0Nagardhavi, Shallow(25-50 cm), non gravelly, clay,Very gently steep to steep sloping (1-
3%), Moderate erosion. 30 3.77
5 NGBmB3g0Nagardhavi, Shallow(25-50 cm), non gravelly, clay,Very gently steep to steep sloping (1-
3%), Severe erosion. 67 8.53
6 TERmB3g0Thirth, Moderately shallow(50-75 cm), non gravelly, clay,Very gently steep to steep
sloping (1-3%), Severe erosion. 8 1.06
7 TERmB3g0S1
Thirth, Moderately shallow(50-75 cm), non gravelly, clay,Very gently steep to steep
sloping (1-3%), Severe erosion, strong stoniness. 24 3.02
8 TERmC3g2S2
Thirth, Moderately shallow(50-75 cm), very gravelly, clay, gently steep to steep sloping
(3-5%), Severe erosion, very strong stoniness . 14 1.84
9 Others* 73 9.3
10
Mapping unit description of Karekal -1 (4D7A3I1d) Micro-watershed in Shorapur taluk & Yadgir district
Page 33
Proposed Crop Plan for Kaerkal-1 Micro-watershed, Shorapur Taluk and Yadgir District based on soil-site–crop suitability Assessment
To be continued….. 24
LMUMapping
unit
Survey
numberCharacters
Crops proposed
Suitable
InterventionField cropsForestry
Crop/Grasses
Horticulture crops
(Rainfed Condition)
Horticulture crops
with suitable
intervention
LMU - 1 NGBmB2g0,
NGBmB3g0,
moderate to
poorly
managed
Karekal -1-
392,380,390,3
83,368,365 -
Maskanal
353,313 -
Hagaratagi.
Nagardhavi,
Shallow (25-
50 cm), non
gravelly, clay,
Very gently
sloping (1-
5%),
moderate
toSevere
erosion.
Sajje, Navane, Black
gram, Green gram and
minor oil seeds, pulses,
Simaruba,
Glyricidia,
Subabul, Butea
Neem, banni,
banyan, ber,
Grasses:
Styloxanthes
hamata,
styloxanthes
scabra, Hybrid
Napier, Sesbania,
Khus grass
Fruit crops:
Custard apple,
Tamarind,Ber,
Vegetables:
clusterbean,
bhendi, Phundi
Flowers:
Gaillardia, Spider
lilly, jasmine etc
Guava, custard apple,
Tamarind, Lime,
pammelo,jamun,Ber,Veg
: Onion, Tomato, Brinjal,
Chilli, Bhendi
Flowers-Gaillardia,
marigold, jasmine, etc
Deep and
wider size
furrows across
the slope,
Drip irrigation
with suitable
soil and water
conservation
measures
Cultivation on
raised bunds,
to be manage
regularly as
soil erosion is
severe
LMU - 2 TERmC3g2S2,
TERmC3g0S1
Karekal -1-
384,381,392,3
84,382,383-
Maskanal.
Thirth,
Moderately
shallow(50-75
cm),
moderate
gravelly and
stony, clay,
very gently to
gently
sloping (3-
5%), severe
erosion
Crops: Sorghum, cotton,
Red gram, Sajje,
Navane, Black gram,
Green gram and minor
oil seeds, pulses,
Simaruba,
Glyricidia,
Subabul, Butea
Neem, banni,
banyan, ber,
Grasses:
Styloxanthes
hamata,
styloxanthes
scabra, Hybrid
Napier, Sesbania,
Khus grass
Fruit crops:
Custard apple,
Tamarind,Ber,
Vegetables:
clusterbean,
bhendi, Phundi
Flowers:
Gaillardia, Spider
lilly, jasmine etc
Guava, custard apple,
Tamarind, Lime,
pammelo,jamun,Ber,Veg
: Onion, Tomato, Brinjal,
Chilli, Bhendi
Flowers-Gaillardia,
marigold, jasmine, etc
Deep and
wider size
furrows across
the slope,
Drip irrigation
with suitable
soil and water
conservation
measures
Cultivation on
raised bunds,
to be manage
regularly as
soil erosion is
severe
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LMU Mapping unit Survey number Characters
Crops proposed
Suitable
InterventionField cropsForestry
Crop/Grasses
Horticulture crops
(Rainfed Condition)
Horticulture crops
with suitable
intervention
LMU -
3
KARmB2g0,
KARmB2g1,
KARmB3g0,
Moderately
managed.
379,378,377,384,
385/1,383,390,37
6,386,387,375,36
7,366,375,374,37
3,372,371,368,36
5,367,366,264,36
6,365- Maskanal
346,356,343,347,
342,341,339,348,
350,317,316,315,
301-hagaratagi
Budihal,
Hagaratagi,
Karekal,
moderately
deep to deep
(75-100 &100-
150 cms), very
gently sloping
1-3%,
moderate
erosion
Soil crop;
sorghum, Bajra, Navni,
green gram, cotton, red
gram, Sun flower Bengal
gram, …etc major crop is
red gram and cotton
followed by sorghum
Simaruba,
Glyricidia,
Subabul, Butea
Neem, banni,
banyan, ber,
Grasses:
Styloxanthes
hamata,
styloxanthes
scabra, Hybrid
Napier,
Sesbania, Khus
grass
Fruit: Custerd apple,
Sapota Guava crops:
Custard, Guha,
Jamun, drum stick,
Papaya,
Vegetables:
clusterbean, bhendi,
Phundi, corander,
onion, chilli, lab lab,
brinjal
Flowers:
marigold, jasmine,
Guava, custard
apple,Tamarind,
sapota,jamun,Ber,
Veg: Onion,
Tomato, Brinjal,
Chilli, Bhendi, lab
lab, coriander, and
green leafs, curry
leaf.
Flowers-Gaillardia,
marigold,
Deep and wider
size furrows and
staggered pits,
Drip irrigation
with suitable soil
and water
conservation
measures to
control srever,
erosion
Cultivation on
raised bunds with
mulches and drip.
LMU -
4
TERmB3g0 380,379 -
maskanal
Budihal, Tirth,
shallow to
Moderately
shallow, (50-
75cm) & (75-
100 cm), non
gravelly , clay,
Very gently to
gently sloping
(1-5%), Severe
erosion
Crops: Sorghum, cotton,
Red gram, Sajje, Navane,
Black gram, Green gram
and minor oil seeds,
pulses,
Simaruba,
Glyricidia,
Subabul, Butea
Neem, banni,
banyan, ber,
Grasses:
Styloxanthes
hamata,
styloxanthes
scabra, Hybrid
Napier,
Sesbania, Khus
grass
Fruit crops:
Custard apple,
Tamarind,Ber,
Vegetables:
clusterbean, bhendi,
Phundi
Flowers:
Gaillardia, Spider lilly,
jasmine etc
Guava, custard
apple, Tamarind,
Lime,pammelo,jam
un,Ber,Veg: Onion,
Tomato, Brinjal,
Chilli, Bhendi
Flowers-Gaillardia,
marigold, jasmine,
etc
Deep and wider
size furrows
across the slope,
Drip irrigation
with suitable soil
and water
conservation
measures
Cultivation on
raised bunds, to
be manage
regularly as soil
erosion is severe
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LMU Mapping
unit
Survey
numberCharacters
Suitable
InterventionField cropsForestry
Crop/Grasses
Horticulture crops
(Rainfed Condition)
Horticulture crops
with suitable
intervention
LMU -
5
DNImC3G0,
Poorly to
unmanaged
356,346,345,34
4,2,9,343,342,3
41,340/2,340/1
,337,335,333,3
32,331,330/2,3
29/1,329/2,322
,321/1,321/2,3
00 - Hagaratagi
Dhoni,
Deep(100-150
cm), non
gravelly, clay,
gently sloping
(3-5%)
Moderate
erosion
Soil crop;
sorghum, Bajra, Navni,
green gram, cotton, red
gram, Sun flower Bengal
gram, …etc major crop is
red gram and cotton
followed by sorghum
Simaruba,
Glyricidia,
Subabul, Butea
Neem, banni,
banyan, ber,
Grasses:
Styloxanthes
hamata,
styloxanthes
scabra, Hybrid
Napier, Sesbania,
Khus grass
Fruit crops:
Custard apple,
Tamarind,Ber, ,Aonla
Vegetables:
clusterbean, bhendi,
Phundi
Flowers:
Gaillardia, Spider
lilly
Guava, custard apple,
Tamarind, Lime,
pammelo,jamun,Ber,Veg:
Onion, Tomato, Brinjal,
Chilli, Bhendi
Flowers-Gaillardia,
marigold,
Deep and
wider size
furrows across
the slope,
Drip irrigation
with suitable
soil and water
conservation
measures
Cultivation on
raised bunds,
to be manage
regularly
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WATER BUDGETTING
To be continued…..
Karekal -1 Micro-watershed, Shorapur Taluk (4D7A11e : Area – 782.81 )
Example:Catchment Details: Area = 782.81 ha Average annual rainfall = 680 mm
Slope = 1- 5% No. of runoff producing rainfall = 18Total depth runoff = 163.35 mm
(Run off producing Rainy day : A day with > 2o mm depth Rain)
A. QUANTITY OF RUNOFF PRODUCED:= (catchment area ha x 10000) x (depth of runoff, mm/1000) = 782.81 x 10000 x 163.35/1000= 12,78,720 m3
B. QUANTITY OF WATER STORED BEHIND GRADED BUNDS(0.3m depth of impounding): = (Bund length x cross section area) x area of watershed = 150 (m) (1/2 x10(m) x 0.3(m)) x 782.81= 1,76,132.25 m3
C. QUANTITY OF RUNOFF AVAILABLE AS EXCESS (for water harvesting): = Runoff generation - runoff stored against bunding system= 12,78,720.10-1,76,132.25= 11,02,587.89 m3
D. RUNOFF EXCESS AVAILABLE FOR WATER HARVESTING per ha per year: = Quantity of excess runoff water/ area of watershed=11,02,587.89 /782.81= 1408.50 m3 /ha
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Runoff excess/ha/yr = 1408.50m3
@ 70% probability runoff excess(1,175-(1,175 X 0.7)) = 422.55 m3 /ha
Average water requirement for annual horticulture crop = 5000 m3 /ha
Additional area could be brought under irrigation = 70% probability runoff excess / Average water required for annual horticulture crop.
= 422.55/5000= 0.10 ha. Per ha.
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CONCLUSION
• Deep soils(100-150 cm) account for 567 ha (72%),and Moderately deep(75-100 cm) account for 46 ha(6%) They are High in available water capacity and can support two rainfed crops. These soils are distributed mostly in the Northen eastern part of micro watershed covering parts of Maskanal, Nagur, Bopargi, Hagaratgi and uppaldinni
• Non gravelly(<15%) Soil occupy about 679 ha (87%) and gravelly(15-35%) about 16 ha (2%) of the area. They need specific andsoil water conservation measures. They are distributed in the north eastern part of the microwatershed occurring in Maskanal, Nagur, Bopargi, Hagaratgi and uppaldinni .
• Gently sloping(3-5%slope) and Very gently sloping (1-3% slope) lands occupy about 107 ha(13%) and 603 ha(77%) respectively .These areas require proper soil and water conservation measures to arrest soil erosion.
• Moderate erosion areas occupy about 504 ha(64%) and Severely erosion areas occupy 206 ha(26%) respectively . They require proper soil and water conservation measures to minimise the soil erosion losses.
• About 567 ha(72%) of the area is Highly suitable and about 46(5%) area is Moderately Suitable and 520 ha(65%) area is Marginally Suitable for Custard apple ,Guva, mango,sapota and jamun due to limitations of depth, gravell, texture, slope and erosion.
•About 73 ha(9 %) of area is Currently not suitable for Custard apple ,Guva, mango, sapota and jamun due to limitations of depth, gravell, texture, slope and erosion.
• Good cultivable land area occupy about 474 ha(60%) , Moderately good cultivable land occupy about 30(3%) and Fairly good cultivation land area occupy about 206(26%) respectively, In land capability classes.