A REPORT ON THE SURVEY ON
FLORAL DIVERSITY IN THE CATCHMENT OF RIVER DHUALIGANGA IN THE URTHING SOBIA HEP
HYDEL PROJECT AREA
By:
Dr SP Sinha
16 May 2006
INTRODUCTION
Inventorying
of biological wealth and assessment of potential resources are by far the most
commonly recognized activities for initiating long term conservation measures.
The Kumaun Himalaya which occupies central sector of Himalayan Mountain
chain and along with a part of Nepal Himalaya lies in the biogeographic
transition of wet eastern and dry western Himalaya.
Therefore, the biological elements of both east and west Himalaya
show a gradient of admixture in this region. While reviewing the literature
shows that most of the past studies on inventory and assessment of biological
diversity (especially plant diversity) are focused on south-western part of
Kumaun e.g. Gaula, Pindari and Sarju catchments (Singh and Singh, 1987, 1992;
Singh et al., 1994; Rawat et al., 1994). The north/eastern part remained under
or unexplored. However recently some studies have been done in the eastern part
of Kumaun region particularly in Gori valley (Kumar et al., 1992 and Kumar et
al., 1993; Dhar, 1997) With respect to Panchchuli area Sahani and Raizada
(1995) described the floristic patterns of Panchchuli range from western side.
Attempt was also made to explore the diversity pattern on eastern side (Dharma
valley) by Rawal and Rai, 1998. The socio-cultural patterns and transformation
in rural populace in the valley have, however, been studied by Nehal and
Nautiyal, 1996; Nehal and Saxena, 1996; Satyal, 1995. The scope of current
study on the floral aspect and methodology adopted are given below:
METHODOLOGY
The methodology followed for the
current survey was as follows:
1. The Management plan of North
Pithoragarh Forest Division and Management Plan for Askot Wildlife Sanctuary
was consulted to get an idea about the boundaries and notification number of
Askot Wildlife Sanctuary. Related people of forest department were contacted to
know the current situation.
2. Entire stretch from Dar village to
the Boungling and Dam site was scanned carefully to collect data on habitat
condition.
3. In the area of proposed power
station site and observations made on the floristic inventory in Dar site and
on the way to Boungling and between Boungling to Dam site.
4. There are possibilities of
variation in and just after the rainy season to study the ground cover in all
the areas mentioned above.
SCOPE OF STUDY
B.
Biological Resources:
I). Flora
·
Forests and forest Types
·
Vegetation profile
·
Economic important plants and endemic taxa, if any
·
Ecological aspects of the catchments
·
Impact of impoundment and construction activities
·
Location of any Biosphere Reserve, National Park or Sanctuary
nearby
II). Flora
Forests and forest Types
The
forests type’s changes with the change in altitudinal zones; Sub-Montane zone
(Sub-tropical) upto about EL. 1,500 m: A temperate zone from EL. 1,500 m to EL. 3,200 m and an
Alpine zone above that to the snowline.
Table:
1 Forest/ dominant types in the valley and
their corresponding Himalayan formation/ forest types
Dominant
Type
|
Corresponding
formation
type ( Singh & Singh 1987)
|
Corresponding
formation
type
(Champion & Seth 1968)
|
Alnus
nepalensis – mixed broad leaved
|
---
|
---
|
Quercus
floribunda – mixed broad leaved
|
Low to mid montane hemisclerophyllous
braod leaf forest (formation 7)
|
Lower (12/C1) and upper (12/C2) west
Himalayan temperate forest
|
Aesculus
indica mixed broad leaved
|
Mid montane winter deciduous( formation 9)
|
Moist temperate deciduous forests(12/C)
|
Tsuga
dumosa –mixed coniferous
|
Mid montane needle leaved evergreen
forests (Formation 8)
|
Coniferous categories of (12/C! &
12/C2) of temperate west Himalaya
|
Taxus
wallichiana-Mixed coniferous
|
- do-
|
- do-
|
Quercus
semecarpifolia-Mixed evergreen
|
Formation type 7
|
12/C1 & 12/C2
|
Pinus
wallichiana
|
Formation type 8
|
- do-
|
Abies
pindrow
|
- do-
|
West Himalayan sub-alpine forest
(Silver fir, 14)
|
Betula
utilis
|
High montane stunted forest (Formation
10)
|
West Himalayan sub-alpine forest (birch)
|
B.
utilis - Rhododendron
|
- do-
|
-do-
|
Vegetation
profile
Moving
towards Dar where construction of Power station is proposed one can easily come
across Ficus sp. (Kapri) and Celtis sp., a plant of fodder value. Cyathula tomentosa dominates the stony
slopes while Rhus sp. is seen scattered here and there. Solanum nigrum, Chenopodium botrys and cynodon dactylon have been noted as a rare species at the Dar
village. In shady moist places Peperomia
tetraphylla covers the tree trunk and rocks. Ricinus communis is frequently seen along the track. Some other
plants commonly encountered in the area are species of Debregesia, Chrysopogon, Rubia, Saccharun, Pennisetum, Nicotiana,
Pouzolzia, Erigeron, Cheilanthus, Anaphalis, Adiantum, polygonum, Cynoglossum and Carex. A little before Dar Village
is forest of Alnus nepalensis (Utis), a plant used as
timber. Trees of Pyrus pashia and
bushes of Berberis are also mixed up in between with Dennstaedtia. Edible fern, Diplazium
esculentum (Lingra), is also fairly common here. In moist situations
species of Hydrocotyle, Elatosterma,
Adiantum etc. grow in abundance. The rocky slopes ahead of Dar are covered
with species of Cotoneaster, Berberis,
Prinseptia utilis and Rubus
ellipticus (Hisalu) with occasional plants of Elaeagnus and Zanthoxylum
armatum, a plant of medicinal importance. As the path proceeds toward
Boungling, a legume (Butea spp.) is
seen in abundance on slopes. The herbaceous plant species around proposed dam
site includes on the slope Tylophora
govanii. Heracleum lanatum, Serratula pallida, species of Aster, Euphorbia etc. Scattered population of Iris decora is another interesting
feature of these slopes. Further ahead a patch of forest comprising typical
Himalayan elements like Rhododendron arboretum, Quercus floribunda, Ilex dipyrena, Litsea sp. With Arundinaria sp. and herbaceous species
like Disporum cantoniensis, Coniogramme
caudate, Paris
polyphylla, Trillium govanianum appears before Boungling Village.
A medicinal plant Paeonia emodi also
grows here. A climber Marsdenia lucida
(Bhagal) also grows in abundance. This is said to be poisonous to cattle. Hedera nepalensis is another common
climber seen in this forest.
The
forest around Sela is a mixed one including Juglans
regia (Akhrot), Aesculus indica
(Pangar), Quercus semecarpifolia
(Kharsu), Ilex dipyrena, Lyconia ovalifolia,
Rhododeron arboretum, Pinus wallichiana (Salla), Abies spectabilis (Raga), Quercus
floribunda (Telunj), Cederus deodara
(Deodar), Salix elegans (Bhoksya), Cotoneaster offinis (Ruins), Pinus spp.
(Chir) etc. In between Lonicera sp.,
Viburnum Sp., Berberis Sp., Corrylus colura and Ulmus wallichiana ( a species of fodder value, now included in the
IUCN Red Data Book are also mixed up but more interesting is the presence of Tsuga dumosa (Patari). This species is
confined to Kumaun Himalaya only as far as North West Himalaya is concerned.
Patches of Taxus wallichiana (Lwaith
Tunder) are to be seen in between. This plant is highly sought after for
treatment of ovarian cancer and has been exploited commercially. The plant has
now listed under endangered category and the International Trade of this plant
or the plant part is now banned under Appendix -II of the CITES. The locals are
said to use the dried bark as substitute for tea. Pure stands of Hippophae are
also occasionally met with in between.
Among the shrubby elements species of Desmodium, Salix, Viburnum and Colquthounia coccinea are abundant on
stony slopes. The herbaceous plants seen are Cardiocrinum giganteum, Gagea lutea, Actaea spicata, Paeonia emodi,
Tussilago farfara, Caltha palustris, Thymus linearis and species of Ainsliea, Carex, Calanthe, Polystichum,
As0plenium, Lepisorus, Corydalis, Gentiana, Valriana, Veronica, Geranium,
Senecio, Anemone etc. Morchella esculanta (Guchhi), a highly sought plant
for culinary and well known for its nutritional value too, also grows in the
forest.
·
Economic important plants
and endemic taxa, if any
TABLE
SHOWING ECONOMIC IMPORTANT PLANTS USED BY LOCAL VILLAGERS FOR DIFFERENT
PURPOSES (*Scientific Name of plants are given in
alphabetical order)
Scientific Name* Name of NTFP Parts
Used Remarks
|
A.
MEDICINAL PLANTS
1.
Aconitum heterophyllum Atis Root Commercial
2. Acorus calamus Buch Root Commercial
3. Berberis asiatica Kilmora Root Commercial
4. Bergenia ciliate Gheepati Rhizome Wound
5.
Dactylorhiza hatagirea Hathajari Root Burns/cuts
6.
Dioscorea deltoidea Ban tarur Tuber Commercial 7.Ephedr gerardiana Tut gatha Stem Asthma
8. Hyoscyamus niger Langtang Seed Toothache
9.
Macrotomia benthamii Balsamjari Root Hair
tonic
10. Megacarpae polyandra Roorki Root Lowfever 11.Myrica esculenta Kaphal Bark
Commercial
12.
Parnassia nubicola Nirbis Root Antidotefor poison
13.
Permelia spp Muk(Lichens) Entire plant Commercial
14. Picrorhiza kurroa Kutki Root Fever
15.
Pleurospermum angelicoidesChhipi
Root Stomachache
16.
Polygonatum verticillum Khakan Root Commercial
17. Rheum australe Chhirchey Root Wound
18. Solanum nigrum Makoi Fruits Dysentery
19. Thalictrum foliolosum Mamira Root Commercial
20.Zanthoxylum alatum Timur Seed Cold
B.
VEGETABLES AND FOOD SUBSIDERY FOOD
1. Allium
wallichii Lathum Leaves
2. Arisaema jacquemontii Bankh Tuber Edible
3.
Asparagus racemosus Keeru Leaves Young leaves
4.
Chaerophyllum villosum Gyan Tuber Edible
5. Chenopodium botrys Bathuwa Whole plantsEdible
6.
Diplazium esculentum Lingoro -do- -do-
7. Fagopyrum cymosum Jhankara -do- -do-
8. Lepidium sativum Ban
Halim Leaves Fever
9.
Morchella Morchella entire fruit Eaten
10. Paeonia emodi Hilto -do- -do-
11. Phytolacca acinosa Jarak Leaves Edible
C. FRUITS
1.
Corylus colurna Tamakha Fruit eaten
2.
Elaeagnus parviflora Gain Fruit
3.
Ficus roxbergii Timal Fruit Fodder
4.
Ficus palmate Beru Fruit
5.
Juglans regia Khaksing Fruit commercial
6.
Prunus cerasoides Padam Fruit Multipurpose
7. Prunus
cornuta Bambhalu Fruit
8.
Ribes uva-crispa var sativumKontilo Fruit Pickles
9.
Sorbis vestita Nephal Fruit
D. SPICES
/ CONDIMENTS /PICKLES
1. Allium stracheyi Jambu Leaves Spice
2.
Carum carvi Thawe seed commercial
3.
Cinnamomum tamala Tejpatta Leaves Commercial
4.
Hippophae tibetana Tar Chuku Leaves Pickles
5. H.
salicifolia Chuku Fruit Pickles
6.
Thymus serpyllum Balma
Jhar Leaves In Brewery
E. INCENSE
/DHOOP
1. J. communis
Sirsing Branches
2. Juniperus pseudosabina
Pama Branches
3. Jurinea macrocephalia Dhoop Root Commercial
4. Nardostachys jatamansi Masi Leaves Commercial
5. Pleurospermum densiflorum Gokul Leaves
6. Rhododendron anthopogon Tarsing Leaves
7. Skimmia laurelola Kedar
Patti Leaves
F. OTHER
USES:
1. Agave Americana Rambans Leaves Fiber
2. Betula utilis Syasing Bark Roof
ceiling
3. Cannabis sativa Bhang Stem and Bark Fiber
4. Cassiope fastigiata Pongche Stem Roof
ceiling
5. Arundinaria falcata Ringal Clums Thatch, Basket
6. Chrysopogon gryllus Chemsi Leaves Thatch
7.
Gerardinia palmate Sium Stem and Bark Fiber
8.
Pringpia utilis Dhindeli Seed Edible
oil
9.
Saussurea obvallata Kawal Flower Religious
10. Taxus baccata Lwait Bark As
tea
|
Endemic plant species which are found in this
starch are as follows:
The
River Dhauliganga catchment area harbours rich biological heritage representing
a considerable admixture of various floristic elements which migrated and
occupied the area from different phytogeographical zones, e.g. steppes elements like Artemisia, hippophae,
Astrgalaus, Caragana and Juniperus from North temperate zones ; European and
Sub-arctic like Aconitum, Clematis, inula, Leontotpdium and Spiraea; North-
eastern elements like Arsaema, Aesculus, Acer and Petula; Mediterranean
elements like Celtis australis, Silene and Quercus; Didyocarus and Goldfussia
representing Indo-Malayan region; and Typical Sino- Himalayan elements like
Cardiocrinum giganteum, Nardostachys and Lyonia. The area being the Eastern
most end of the Western Himalaya and Western most part of E.Himalaya serve as a
buffer zone of Floristic elements which harbours gene pools equally from the
both phytogeographical regions,e.g., Tsuga dumosa an elements of E. Himalayan
forests and Picea smithiana and Cedrus deodara essentially the elements of
W.Himalaya. Furthermore, the area assumes still greater importance botanically
as it being an extension of Sino-Himalayan region which constitute secondary
center of diversity for primary gene pool for some of the temperate genera
(Kumar, 1983).
ECOLOGICAL ASPECTS OF THE CATCHMENTS
Following components of the
biodiversity were observed during the visit/survey of the study sites:
§ Land animals (wild and
domestic) including reptiles
§ Predatory birds
§ Small game fish
§ Fish, and shellfish
§ Natural floral diversity
with economic important and endemic plant species
§ Insects
§ Aquatic plants and
§ Micro fauna
IMPACT OF IMPOUNDMENT AND CONSTRUCTION
ACTIVITIES
1.
Impact of impoundment
The catchment formed by the dam may cause
following impacts-
·
Destruction of pristine area
·
Loss of original river section; changes in flow regime,
detention time,
·
Collection / settlement of sediments
·
Water born pathogens
·
Local climate changes, e.g. increased fog
·
Change in down stream water quality
·
Eutrofication effect
·
Alter down stream fish populations
·
Altered water conditions
·
Proliferation of lake fish populations and associated
organisms
·
Decreased woodland and wildlife
·
Blocking of wildlife migration routes
·
Decreased many
economic and endemic plant species
·
Changed evapotranspiration and seepage
·
Increased wetland flora and fauna
·
Temporary changes in air quality
·
Earthquake and land slides risk
2.
Impact of construction
activities
Construction activities
that will add pollutants to the atmosphere or alter the weather and climate may
result in adverse effects on people, plants, animals, materials and buildings.
These effects can occur at the local, regional or even global scale.
Air impacts
·
Diffusion factor
·
Particulates
·
Sulfur oxides
·
Hydrocarbons
·
Nitrogen oxides
·
Carbon monoxide
·
Photochemical oxidants
·
Hazardous toxicants
·
Odours
Water Impacts
·
Aquifer safe yield
·
Flow variation
·
Oil
·
Radioactivity
·
Suspended solids
·
Thermal pollution
·
Acid and alkali
·
Biochemical oxygen demand (BOD)
·
Dissolved oxygen (DO)
·
Dissolved solids
·
Nutrients
·
Toxic compounds
·
Aquatic life
·
Fecal coli forms
Land Impact
·
Soil stability
·
Natural hazard
·
Land use patterns
·
Soil erosion
·
Waste disposal
Ecological Impact
·
Loss of , and damage to, habitats and plant and animal
species
·
Loss of, and damage to, geological, palaeontological and
physiographic features
·
Other ecological consequences
Sound Impact
·
Physiological effects
·
Psychological effects
·
Communication effects
·
Performance effects
·
Social behavior effects
Socio-economic impact
1.
Direct economic
·
Local – non local employment
·
Characteristics of employment
·
Labour supply and training
·
Wage levels
2.
Indirect / wider economic / expenditure
·
Employee retail expenditure
·
Liked supplier to main development
·
Labour market pressures
·
Wider multiplier effects
3.
Demographic
·
Changes in population sizes; temporary and permanent
·
Changes in other population characteristics (i.e. family
size, income levels, socio-economic groups )
·
Settlement patterns
4.
Housing
·
Various housing tenure types
·
Public and private
·
House prices
·
Homelessness and other housing problems
5.
Other local services: public and private sector
·
Educational services
·
Health services; social support
·
Others (e.g. police, fire, recreation, transport)
·
Local finances
6.
Socio-cultural
·
life styles / quality of life
·
social problems (e.g. crime, illness, divorce)
·
community stress and conflict; integration and alienation
Location of
any Biosphere Reserve, National Park or Sanctuary nearby
Currently
the catchment of River Dhauliganga comes under the Askot Wildlife Sanctuary. It
was notified by the Government of Uttar Pradesh under G.O No. 996/14-3-30/84
dated 30.7.1986 for the conservation of regional flora and fauna (Arya, 1991).
There are possibilities of denotify the project area and to cast out the area
from Ascot Wildlife sanctuary and is under consideration.