8. monitoring of impacts of gulpur hydropower project on...
TRANSCRIPT
Monitoring of Impacts of GulpurHydropower Project on Populations of
Mahseer and Other Fish Species
December 04, 2018
Ahmad Shoaib
Introduction
n 100 MW Gulpur Hydropower Project is being constructed on the Poonch River in the Pakistan Administered Kashmir.
n It is expected to start its operation by mid 2019. n Full length of Poonch River is 104 km.n River and its associated tributaries were notified as a
national park by the government in 2010.n Poonch River provides a highly suitable habitat for the
Golden Mahaseer “Tor putitora.”n In addition to Golden Mahaseer,
n At least 35 other species of fish in the river including the Critically Endangered Glyptothorax kashmirensis
n 5 migratoryn 2 restricted range species 2 0f 26
n Condition for construction of project is only given to achieve Net Gain in biodiversity in consistent with the requirements of IFC Performance Standard 6 for projects falling Critical Habitat.
n A Biodiversity Action Plan inclusive of a Monitoring and Evaluation Plan was established to monitor:n The impacts of the project on aquatic biodiversity.n The outcome of actions for in-situ protection of the fish to
achieve the Net Gain in biodiversity.n Seasonal surveys following a defined protocol were
initiated prior to:n Construction of the project.n Construction of the coffer dam that has created a barrier to
fish migration, and have continued since. 3 0f 26
Introduction (Contd…)
Details of Surveys Completed
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Sampling Year, Month
Sampling Season
Sampling MethodsElectrofishing Gill Net Cast Net Fyke Net
October 2015 Fall 2015 ü ü ü ü
December 2015 Winter 2015 ü ü
May 2016 Spring 2016 ü ü ü
August 2016 Summer 2016 ü ü ü
January 2017 Winter 2016 ü
May 2017 Spring 2017 ü ü
August 2017 Summer 2017 ü ü
January 2018 Winter 2017 ü
May 2018 Spring 2018 ü ü
August 2018 Summer 2018 ü ü
Monitoring Locations
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Field Activities
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Cast Netting
Gill Netting
Electrofishing
Fyke Netting
Field Activities (Contd…)
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Periphyton Sampling
Macro-Invertebrates SamplingData Keeping
Monitoring Results of Fish – Spring Surveys
Total fish specimens captured:n 430 in 2016n 495 in 2017n 829 in 2018
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5821 35
316
85
3061
319
153
72
128
476
0
50
100
150
200
250
300
350
400
450
500
Upstream Dam Immediate DownstreamDam
Downstream Dam Tribuatries
2016 2017 2018
Monitoring Results of Fish – Summer Surveys
Total fish specimens captured:n 497 in 2016n 303 in 2017n 668 in 2018NOTE: three locations were not completely sampled in Summer 2017.
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180
27 31
259
21 1551
216
130
5273
413
0
50
100
150
200
250
300
350
400
450
Upstream Dam Immediate Downstream ofDam
Downstream Dam Tributaries
Summer 2016 Summer 2017 Summer 2018
Monitoring Results of Fish – Winter Surveys
Total fish specimens captured:n 39 in 2015n 93 in 2016n 109 in 2017
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18
129
53
13
272729
53
0
10
20
30
40
50
60
Upstream Dam Immediately Downstream Dam Site Downstream Dam
2015 2016 2017
Monitoring Results of Fish – Spring SurveysMahseer Abundance
Total fish specimens captured:n 81 in 2016n 40 in 2017n 102 in 2018
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0
10
20
30
40
50
60
70
Upstream Dam Immediate Downstream Dam Downstream Dam Tributaries
Spring 2016 Spring 2017 Spring 2018
Monitoring Results of Fish – Summer SurveysMahseer Abundance
Total fish specimens captured:n 100 in 2016n 82 in 2017n 106 in 2018
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32
25
8
35
10 8
2
62
10
28
14
54
0
10
20
30
40
50
60
70
Upstream Dam Immediate Downstream ofDam
Downstream Dam Tributaries
Summer 2016 Summer 2017 Summer 2018
Monitoring Results of Fish – Winter SurveysMahseer Abundance
Total fish specimens captured:n 5 in 2015n 34 in 2016n 32 in 2017
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0
4
1
33
0 1
15
8 9
0
5
10
15
20
25
30
35
Upstream Dam Immediately Downstream Dam Site Downstream Dam
2015 2016 2017
n Relative increase in fish populations of most of the species upstream of the dam including the Mahaseer, while downstream the population of Mahaseer has remained stable.
n Consistent results with the predictions of impacts made using the DRIFT DSS as a part of the project ESIA, and shows that the impact of the barrier created by the cofferdam has been offset by the conservation program put in place.
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Conclusion of Fish Monitoring Results
Special aspect studied: impact of temporary diversion tunnels on fish populations that allow fish to move downstream only
n Trend in the populations of migratory fish:n species that prefer warmer water have accumulated downstream
of the damn species that prefer cooler water have survived largely upstream of
the dam.
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Entrapment of Fish
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n Observed in the summer sampling that migratory species e.g. Pakistani Labeo, Mahaseer and Snow Trout were trapped below the diversion tunnels.
n A drop of about one meter at the outlet of the diversion tunnel provided a barrier to fish migrating upstream.
n Water velocities were also high and appeared to be 4-5 m/s or more.
Fish Entrapped at the Mouth of Tunnel
Capture and Transportation of Fish
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Collection of FishGill Netting for the Collection of Fish
Transportation of Fish Releasing Fish
Fish Capture and Transportation
n Fish capture and transportation was conducted between October 06 – December 20, 2017
n Gill nets were used for fish capture.n The captured specimens were transported and released at three
points.n Main River near the confluence of Bann Nullahn Main River near the confluence of Rangar Nullahn Main River near the confluence of Nehl Nullah
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Total Fish Transported from Downstream to Upstream of the Dam
§ Total specimens of fish transported: 3,276§ Total Number of Labeo: 2,003§ Total Number of Snow trout: 951§ Total Number of Mahseer: 322§ Mortality rate 2-3%
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Fish Migration Pattern
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0
5
10
15
20
25
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
6-Oct-17 16-Oct-17 26-Oct-17 5-Nov-17 15-Nov-17 25-Nov-17 5-Dec-17 15-Dec-17
Overall Downstream Movement Overall Upstream Movement Temperature
Inspection for Fishing Pressures – Incidents of Fishing Observed
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79
2429
21 24
1419
123
0
20
40
60
80
100
120
140
May-16 Aug-16 Oct-16 Jan-17 Jun-17 Jan-18 Jun-18 Sep-18
Inspection for Fishing Pressures – Level of Fishing by Selective Fishing Methods
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0
20
40
60
80
100
120
140
May-16 Aug-16 Oct-16 Jan-17 Jun-17 Jan-18 Jun-18 Sep-18
Hook and Line Cast Net Gill Net Rods
Inspection for Fishing Pressures – Level of Fishing by Non-Selective Fishing Methods
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0
1
2
3
4
5
6
7
8
May-16 Aug-16 Oct-16 Jan-17 Jun-17 Jan-18 Jun-18 Sep-18
Electrocution Poison Dynamite
26 of 22Thank You.