In an integrated approach, watershed management crucially needed to maintain condition and quality of watershed. Land use change is one of main causes of watershed condition and quality changing. Therefore, it required planning alternatives suggestions to prevent and recover the watershed degradation. The research was carried out to study about watershed changes and degradation due to land use change and investigating for the best alternative to restore Ciujung Watershed, Banten, Indonesia using Soil and Water Assessment Tool (SWAT) model. Research result showed that the reduced of forest area (plantation forest, primary dryland forest, secondary dryland forest) and the increased of dryland agricultural, dryland mixed farming (mixed with bush, plantation, rice fields and bushes) caused the increase of river flow. Several alternative soil and water conservation techniques as if reforestation, agroforestry, strip cropping, contour cropping, dam building and the application of bio-retention hole could be done for land management to maintain and improve the condition and quality of Ciujung Watershed which is indicated by a decrease in values of River Regime Coefficient (RRC), surface runoff coefficient, and sediment yield.

1. G. Dunjó, G. Pardini, and M. Gispert, “The role of land use–land cover on runoff generation and sediment yield at a microplot scale, in a small mediterranean catchment,” Journal of Arid Environments, vol. 57, no. 2, pp. 239–256, 2004. doi: http://doi.org/10.1016/S0140-1963(03)00097-1
2. F. K. Maalim, A. M. Melesse, P. Belmont, and K. B. Gran, “Modeling the impact of land use changes on runoff and sediment yield in the Le Sueur watershed, Minnesota using GeoWEPP,” Catena, vol. 107, pp. 35–45, 2013. doi: http://doi.org/10.1016/j.catena.2013.03.004
3. L. Qiao, C. B. Zou, R. E. Will, and E. Stebler, “Calibration of SWAT model for woody plant encroachment using paired experimental watershed data,” Journal of Hydrology, vol. 523, pp. 231–239, 2015. doi: http://doi.org/10.1016/j.jhydrol.2015.01.056
4. L. M. Rachman, “Can the fluctuation of RiverRegime Coefficient (RRC) be used as an indication of fluctuations in the Quality of Watersheds (QoW)?” in Proceedings of the National Seminar on Integrated Watershed Management Towards the Preservation of Environmental Functions and Community Welfare, Sebelas Maret University, Surakarta, Indonesia, 2018.
5. L. M. Rachman, “Technical development to assess soil health using soil health index in Indonesia,” Journal of Applied and Physical Sciences, vol. 4, no. 3, pp. 79–85, 2018. doi: https://doi.org/10.20474/japs-4.3.1
6. X. Wang, N. Kannan, C. Santhi, S. Potter, J. Williams, and J. Arnold, “Integrating APEX output for cultivated cropland with SWAT simulation for regional modeling,” Transactions of the ASABE, vol. 54, no. 4, pp. 1281–1298, 2011.
7. S. Sudaryono, “Integrated watershed management(DAS), the concept of sustainable development,” Jurnal Teknologi Lingkungan, vol. 3, no. 2, pp.153–158, 2011.
8. S. Arsyad, Soil and water conservation. PT Penerbit IPB Press, 2009.
9. K. Kustamar, E. Hargono, and B. Subakti, “Flood control strategy in solid residential area,” Buletin Utama Teknik, vol. 14, no. 1, pp. 1–5, 2018.
10. J. G. Arnold, D. N. Moriasi, P. W. Gassman, K. C. Abbaspour, M. J. White, R. Srinivasan, C. Santhi, R. Harmel, A. Van Griensven, M. W. Van Liew et al., “Swat: Model use, calibration, and validation,” Transactions of the ASABE, vol. 55, no. 4, pp. 1491–1508, 2012. doi: http://doi.org/10.13031/2013.42256
11. J. Arnold, J. Kiniry, R. Srinivasan, J. Williams,E. Haney, and S. Neitsch, “Soil and water assessment tool input/output file documentation version 2009,” Texas, TX: Texas Water Resources Institute, Tech. Rep., 2011.
12. L. Li, L. Zhang, J. Xia, C. J. Gippel, R. Wang, and S. Zeng, “Implications of modelled climate and land cover changes on runoff in the middle route of the south to north water transfer project in China,” Water Resources Management, vol. 29, no. 8, pp. 2563–2579, 2015.
13. R. Liu, P. Zhang, X. Wang, J. Wang, W. Yu, andZ. Shen, “Cost-effectiveness and cost-benefit analysis of BMPs in controlling agricultural nonpoint source pollution in China based on the SWAT model,” Environmental Monitoring and Assessment, vol. 186, no. 12, pp. 9011–9022, 2014. doi: http://doi.org/10.1007/s10661-014-4061-6
14. M. Yusuf, B. Firuza, and O. Khairulmaini, “Variation in soil physiochemical properties at different land use sites in Northeastern Nigeria,” International Journal of Applied and Physical Sciences, vol. 3, no. 1, pp. 26–34, 2017. doi: https://doi.org/10.20469/ijaps.3.50004-1
15. P. Phomcha, P. Wirojanagud, T. Vangpaisal, andT. Thaveevouthti, “Modeling the impacts of alternative soil conservation practices for an agricultural watershed with the SWAT model,” Procedia Engineering, vol. 32, pp. 1205–1213, 2012.
16. U. Chaube, S. Suryavanshi, L. Nurzaman, and A. Pandey, “Synthesis of flow series of tributaries in upper Betwa basin,” International Journal of Environmental Sciences, vol. 1, no. 7, pp. 1459–1475, 2011.
17. C. Santhi, J. G. Arnold, J. R. Williams, W. A. Dugas, R. Srinivasan, and L. M. Hauck, “Validation of the swat model on a large rwer basin with point and nonpoint sources 1,” JAWRA- Journal of the American Water Resources Association, vol. 37, no. 5, pp. 1169–1188, 2001.
18. L. M. Rachman, “Contribution of embungs in increasing water supply for agriculture and improving the Quality of Watersheds (QoD),” in Proceedings of the National Seminar on Integrated Watershed Management Towards the Preservation of Environmental Functions and Community Welfare, Sebelas Maret University, Surakarta, Indonesia, 2018.

L. M. Rachman, D. Sulaeman, Y. Hidayat, and D. P. T. Baskoro, “Study of land use change for preparation of watershed management planning,” International Journal of Applied and Physical Sciences, vol. 5, no. 3, pp. 64-72, 2019. doi: https://dx.doi.org/10.20469/ijaps.5.50001-3