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Infiltration-Friendly Agroforestry Land Uses on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia

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Title Infiltration-Friendly Agroforestry Land Uses on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia
 
Creator Suprayogo, D.
Noordwijk, M. van
Hairiah, K.
Meilasari, N.
Rabbani, A.L.
Ishaq, R.M.
Widianto, W.
 
Subject land use
agroforestry
watershed management
ecology
 
Description Forest conversion to agriculture can induce the loss of hydrologic functions linked to infiltration. Infiltration-friendly agroforestry land uses minimize this loss. Our assessment of forest-derived land uses in the Rejoso Watershed on the slopes of the Bromo volcano in East Java (Indonesia) focused on two zones, upstream (above 800 m a.s.l.; Andisols) and midstream (400–800 m a.s.l.; Inceptisols) of the Rejoso River, feeding aquifers that support lowland rice areas and drinking water supply to nearby cities. We quantified throughfall, infiltration, and erosion in three replications per land use category, with 6–13% of rainfall with intensities of 51–100 mm day−1. Throughfall varied from 65 to 100%, with a zone-dependent intercept but common 3% increase in canopy retention per 10% increase in canopy cover. In the upstream watershed, a tree canopy cover > 55% was associated with the infiltration rates needed, as soil erosion per unit overland flow was high. Midstream, only a tree canopy cover of > 80% qualified as “infiltration-friendly” land use, due to higher rainfall in this zone, but erosion rates were relatively low for a tree canopy cover in the range of 20–80%. The tree canopy characteristics required for infiltration-friendly land use clearly vary over short distances with soil type and rainfall intensity.
 
Date 2020-07-23
2021-04-14T03:45:47Z
2021-04-14T03:45:47Z
 
Type Journal Article
 
Identifier Suprayogo, D., van Noordwijk, M., Hairiah, K., Meilasari, N., Rabbani, A.L., Ishaq, R.M. and Widianto, W., 2020. Infiltration-friendly agroforestry land uses on volcanic slopes in the Rejoso Watershed, East Java, Indonesia. Land, 9(8), p.240. https://doi.org/10.3390/land9080240
2073-445X
https://hdl.handle.net/10568/113334
https://www.mdpi.com/2073-445X/9/8/240
https://doi.org/10.3390/land9080240
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 240
 
Publisher MDPI AG
 
Source Land