Hillslope Hydrology and Landuse Effect on Streamflow and...
Transcript of Hillslope Hydrology and Landuse Effect on Streamflow and...
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Hillslope Hydrology and Landuse Effect on Streamflow and Water Quality
in the Batanghari River Basin, Indonesia
Luki SubehiResearch Centre for Limnology
Bogor - November 3, 2017
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Generally, stream water temperature often has been related to air temperature thatalso related to global warming and meteorological conditions as annual or longertime-scale fluctuations (Mohseni et al., 1999; Fukushima et al., 2000; Tung 2006).
Characteristics of stream water temperature fluctuations at forested watershedshould be elucidated in order to manage downstream water quality control forprotection of aquatic habitat and environment (Danehy et al., 2005). It could be alsoexplained that stream water temperature fluctuations influence the change in speciescomposition.
Precipitation may cause changes in stream water temperature due to direct inputs(i.e. channel interception) and by inducing runoff from various hydrological stores andpathways (Kobayashi et al., 1999; Brown and Hannah 2007).
Changes in stream water temperature during rainfall events help to identify themechanism that generates the initial response as direct inputs of rainwater, surfaceand subsurface flows or discharge of groundwater.
Stream water temperature as a supplementary tracer is used to identify the watersources contributing to runoff processes at forested watersheds (Shanley and Peters1988; Kobayashi et al., 1999).
Some references
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Important informationThe forested watershed conditions affect the fluctuations in streamwater temperatureThe changes in Tw and water quality parameters during rainfallevents and analysis of the hydrological dynamicsThe changes in Tw and water quality parameters could indicate the flowpaths and trace the contribution of surface, subsurface and groundwaterflows into the stream in different ways due to slope gradients duringrainfall events.
How about the characteristics in Tropical Forest ???
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ADMINISTRATION MAP
7
Luasan (Ha)
Ocean 0.444.594 Land 4.898.998
GENERAL DESCRIPTION OF LOCATION
Source : Bappeda Prov. Jambi
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KERINCI235,797 people
SAROLANGUN 259,963 people
BATANGHARI 252,731 people
MERANGIN 350,062 people
BUNGO 320,300 people
TANJAB BARAT 293,594 people
MUARO JAMBI363,994 people
TANJAB. TIMUR 211,057 people
TEBO 313,420 people
KOTA JAMBI 557.321 orang
KOTA S. PENUH 84,575 people
AREA53,435 Km2
ADMINISTRATION9 Regency/2 City
POPULATION :3,169,814 people(2011) 3,242,814 people (2012
11/24/2017
KOTA JAMBI 557,321 people
Source : Bappeda Prov. Jambi
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TOPOGRAPHY
9
TOPOGRAPHY/ HEIGHT (M/ASL)
AREAREGIONAL
HA %
Low Land(0 – 100 ) 3.431.165 67 KOTA JAMBI, TANJUNG JABUNG BARAT, TANJUNG JABUNG TIMUR, MUARO JAMBI,
MERANGIN, BATANG HARI
Middle Land (100 – 500) 903.180 17 SEBAGIAN SAROLANGUN, TEBO, SEBAGIAN BATANG HARI, KOTA SUNGAI PENUH,MERANGIN, SEBAGIAN TANJUNG JABUNG BARAT,
High Land(> 500) 765.655 16 KERINCI, KOTA SUNGAI PENUH, SEBAGIAN MERANGIN, SEBAGIAN SAROLANGUN
DAN SEBAGIAN BUNGO
TOTAL 5.100.000 100
Source : Bappeda Prov. Jambi
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1010
GENERAL CONDITIONSSource : Bappeda Prov. Jambi
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(70.00)
(60.00)
(50.00)
(40.00)
(30.00)
(20.00)
(10.00)
-
10.00
(24.77)(24.87)
(0.40)(3.77)
(17.86)(18.77)
(33.11)
(14.62)
(64.01)
- 1.21
(19.57)
RegencyArea (Ha)
2000 2009
Kab. Batanghari 129,188 103,543
Kab. Bungo 141,983 113,705
Kab. Kerinci 182,614 181,881
Kab. Merangin 319,808 308,192
Kab. Muaro Jambi 107,529 91,236
Kab. Sarolangun 181,619 152,913 Kab. Tanjung Jabung Barat 117,611 88,354 Kab. Tanjung Jabung Timur 130,852 114,161
Kab. Tebo 270,805 165,114
Kota Jambi - -
Kota Sungaipenuh 22,410 22,683
Total 1,604,419 1,341,781
Source : Bappeda Prov. Jambi
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Site Location – Batanghari Watershed
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Location for water quality sampling
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Location of soil sampling and infiltration measurement
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Materials and Equipment
Primary DataSoil Properties from laboratory analysis; permeability, texture,organic matter, bulk density, porosityInfiltration of the results of measurements in the field
Secondary Data Land System Map (Indonesian Soil Research Institute) Land use map (Landsat imagery in 2013) Rainfall data (Indonesian Agency for Meteorology) Hydrological data (Water Resources Research Centre – PU)Administration Map (Central River Region VI) Turf – tec
infiltrometer
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Spatial distribution of soil permeability
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Potential water catchment areas
Ratio of Qmax/Qmin tends
to increase
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PARAMETER• Parameter Physics: Water temperature,
Conductivity, TDS, TSS (total suspended solid), Turbidity, Colour.
• Parameter Chemical : pH, BOD, COD, DO (Oksigen Terlarut), Phospat (PO4), Amoniak (NH3-N), Nitrat (NO3), Nitrit (NO2), Cl. Fe, Mn, Pb.
Source BLHD Prov. Jambi
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CONDITIONS AROUND BATANGHARI WATERSHED
• Human domestic activity:Bath, wash, etc
• Illegal mining :Gold mining, sand and stone
• Plantation : Crude palm oil (CPO) and other industries
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Some analysis of Turbidity
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Riv
SK-1
SK-2
SK-3
HD: 10 mVD: 4.7 m
HD: 10 mVD: 3 m
HD: 8 mVD: 3 m
0.05 m
5.71 m
5.57 m
(0.19) m
( 6.16 ) m
(0.13) m
(2.77) m
( 5.91) m
(2.57 ) m
Position water level 4 m from the surfaceDistance between sensor – bottom soil, 28 cm
Position water level 2.43 m from the surfaceDistance between sensor –bottom soil, 20 cm
hard bedrock layer
hard bedrock layer
Sekancing area, Merangin JambiNatural Rubber – Unmanaged forest type
Distance between sensor – bottom soil, 14 cm
Location of Study Area Plan
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Rainfall simulator
• Based on Meyer and Harmon (1979)
• Nozzle: Veejet 80150 (Spraying System Co. Ltd., U.S.A.)
• Water Input Current meter: LF10-PTN, HORIBA, JAPAN)
• Nozzle height: 2m above surface
• Rainfall intensity: 190.6~195.4 mm/h (about 15 J/m2/mm)
• Every 30 sec, recording runoff discharge and sampling
Prof. Kim JinKwan – CNU (2017)
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Surface conditionsFloor covered Bare undisturbed Bare plowed
Prof. Kim JinKwan – CNU (2017)
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THANK YOU