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The number of palaeochannels based on the distance from the eruption center_
| No. | River | The distance from crater [km] | Total | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | |||
| 1 | Gendol | 0 | 0 | 0 | 4 | 0 | 0 | 2 | 4 | 7 | 3 | 0 | 0 | 9 | 0 | 20 |
| 2 | Kuning | 0 | 0 | 5 | 5 | 1 | 3 | 5 | 2 | 1 | 1 | 0 | 1 | 1 | 0 | 25 |
| 3 | Boyong | 0 | 0 | 0 | 1 | 2 | 6 | 4 | 2 | 2 | 2 | 0 | 1 | 2 | 2 | 24 |
| 4 | Bedog | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 6 | 3 | 4 | 3 | 2 | 23 |
| 5 | Krasak | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 2 | 2 | 5 | 2 | 0 | 2 | 10 | 26 |
| 6 | Batang | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 2 | 2 | 0 | 4 | 5 | 17 |
| 7 | Putih | 0 | 0 | 1 | 2 | 2 | 1 | 2 | 2 | 3 | 4 | 1 | 2 | 3 | 1 | 24 |
| 8 | Lamat | 0 | 5 | 2 | 1 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 12 |
| 9 | Blongkeng | 0 | 4 | 2 | 2 | 0 | 0 | 0 | 2 | 2 | 5 | 2 | 2 | 7 | 1 | 29 |
| 10 | Pabelan | 5 | 2 | 2 | 1 | 1 | 2 | 3 | 4 | 1 | 3 | 8 | 3 | 2 | 14 | 51 |
| Total | 5 | 11 | 12 | 18 | 8 | 14 | 17 | 20 | 23 | 33 | 18 | 13 | 14 | 35 | 251 | |
Types of data, data collection techniques and instruments/data sources_
| No | Data | Collection method | Instrument/data sources |
|---|---|---|---|
| 1 | Palaeochannel location | Observation | GPS, geological compass, digital camera |
| Documentation | Documentation of Indonesian Topographical Map (Peta Rupabumi Indonesia or RBI Map) published by National Coordinator for Survey and Mapping Agency of Indonesia (2000) | ||
| Remote sensing image interpretation | Quickbird Imagery (2015) | ||
| 2 | Location of actual river valley | Observation | GPS, geological compass, digital camera |
| Documentation | Documentation of Indonesian Topographical Map (Peta Rupabumi Indonesia) | ||
| Remote sensing image interpretation | Quickbird Imagery (2015) | ||
| 3 | Morphography and morphometry of the landform at palaeochannel | Observation | Abney level, digital camera, observation guide |
| 4 | Geomorphological process | Observation | Digital camera, observation guide |
| 5 | Rock type | Literature study | Newhall et al. (2000), Andreastuti et al. (2000), Gertisser et al. (2012) |
| Observation | Geological hammer, geological compass | ||
| 6 | Land use | Documentation | Documentation of Indonesian Topographical Map (Peta Rupabumi Indonesia) |
| Observations | Digital camera, observation guide |
The morphometrical measurement of the palaeochannel in the research area_
| River area | Depth [m] | Width [m] | Slope [%] | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Mean | Median | SD | Max | Min | N | Mean | Median | SD | Max | Min | n | Mean | Median | SD | Max | Min | |
| Gendol | 4 | 1.25 | 1.0 | 0.5 | 2.0 | 1.0 | 4 | 88.00 | 67.0 | 64.02 | 180 | 38 | 4 | 5.00 | 5 | 0.00 | 5 | 5 |
| Kuning | 5 | 2.00 | 2.0 | 0.71 | 3.0 | 1.0 | 5 | 69.00 | 65.0 | 9.72 | 83 | 60 | 5 | 4.20 | 5 | 1.10 | 5 | 3 |
| Boyong | 7 | 1.14 | 1.0 | 0.38 | 2.0 | 1.0 | 7 | 67.43 | 60.0 | 25.01 | 112 | 44 | 7 | 9.86 | 10 | 4.26 | 18 | 5 |
| Bedog | 5 | 2.00 | 2.0 | 1.00 | 3.0 | 1.0 | 5 | 75.40 | 87.0 | 45.81 | 122 | 21 | 5 | 3.40 | 3 | 1.67 | 5 | 1 |
| Krasak | 11 | 2.00 | 2.0 | 1.20 | 4.0 | 0.5 | 11 | 169.27 | 162.0 | 53.89 | 277 | 91 | 11 | 3.73 | 3 | 1.01 | 5 | 3 |
| Batang | 7 | 1.14 | 1.0 | 0.63 | 2.0 | 0.5 | 7 | 96.57 | 82.0 | 57.57 | 179 | 11 | 7 | 2.71 | 3 | 0.76 | 3 | 1 |
| Putih | 8 | 1.19 | 1.0 | 1.16 | 4.0 | 0.5 | 8 | 66.88 | 54.5 | 39.24 | 155 | 33 | 8 | 3.25 | 3 | 0.71 | 5 | 3 |
| Lamat | 5 | 1.20 | 1.0 | 0.45 | 2.0 | 1.0 | 5 | 36.40 | 25.0 | 26.68 | 83 | 19 | 5 | 8.80 | 7 | 2.49 | 12 | 7 |
| Blong keng | 4 | 0.50 | 0.5 | 0.00 | 0.5 | 0.5 | 4 | 65.50 | 64.0 | 26.71 | 96 | 38 | 4 | 3.00 | 3 | 0.00 | 3 | 3 |
| Pabelan | 4 | 0.88 | 1.0 | 0.25 | 1.0 | 0.5 | 4 | 58.25 | 55.0 | 22.02 | 88 | 35 | 4 | 9.75 | 10 | 2.22 | 12 | 7 |