Efektivitas Tutupan Rumput Gajah (Pennisetum purpureum) dalam Mitigasi Erosi Tanah oleh Air Hujan

https://doi.org/10.22146/agritech.50290

Muhammad Chrisna Satriagasa(1*), Hatma Suryatmojo(2)

(1) Fakultas Kehutanan, Universitas Gadjah Mada, Yogyakarta
(2) Fakultas Kehutanan Universitas Gadjah Mada
(*) Corresponding Author

Abstract


Aktivitas manusia yang intensif terhadap lahan menyebabkan erosi dipercepat. Dampaknya yaitu tanah dari wilayah hulu terpindahkan ke wilayah hilir menyebabkan dampak serius. Tanaman penutup tanah memiliki peranan penting dalam pengurangan erosi tanah dengan cara mengurangi energi kinetik air. Penelitian ini bertujuan menginvestigasi dan menganalisis rumput gajah (Pennisetum purpureum) dalam mengurangi limpasan permukaan dan erosi tanah. Penelitian ini bersifat ekperimental dengan menggunakan simulator hujan. Simulator hujan yang digunakan memiliki ukuran 200 cm (T) x 120 cm (P) x 120 cm (L) dan memiliki 10 nozzle, dapat mensimulasikan intensitas hujan dan kemiringan lereng. Parameter yang digunakan dalam simulasi ini yaitu intensitas hujan sebesar 54,59 mm/jam, kemiringan lereng sejumlah 5 kelas. Intensitas hujan dipilih dengan pertimbangan simulasi pada intensitas hujan sangat lebat serta keterbatasan alat dalam meproduksi variasi intensitas hujan. Plot uji berukuran 80 cm (P) x 50 cm (L) x 30 cm (T) sebanyak 10 plot yang terdiri dari 2 jenis yaitu dengan rumput dan tanpa rumput. Pengukuran setiap plot dilakukan selama 60 menit dan dilakukan pengambilan data setiap 2 menit. Analisis kuantitatif dilakukan pada limpasan permukaan dan sedimentasi, sedangkan analisis kualitatif dilakukan terhadap bentukan erosi. Temuan dari penelitian ini yaitu tutupan rumput gajah mampu mengurangi akumulasi limpasan permukaan hingga lahan dengan lereng miring (15-25%). Tutupan rumput dapat mengurangi erosi sebesar 98,85% yang didekati menggunakan parameter turbidity. Tanah di lokasi kajian memiliki karakteristik fisik yang rentan terhadap erosi, sehingga tutupan lahan khususnya rumput gajah sangat berperan dalam mengurangi potensi bahaya erosi.

Keywords


Erosion; elephant grass; rainfall simulator; sedimentation; surface runoff



References

Abudi, I., Carmi, G., & Berliner, P. (2012). Rainfall Simulator for Field Runoff Studies. Journal of Hydrology, 454455, 76–81.

Aksoy, H., Unal, N. E., Cokgor, S., Gedikli, A., Yoon, J., Koca, K., … Eris, E. (2012). A rainfall simulator for laboratory-scale assessment of rainfall-runoff-sediment transport processes over a two-dimensional flume. Catena, 98, 63–72.

Angima, S. D., Stott, D. E., O’Neill, M. K., Ong, C. K., & Weesies, G. A. (2002). Use of calliandra–Napier grass contour hedges to control erosion in central Kenya. Agriculture, Ecosystems and Environment, 91, 15–23.

Blanco, H., & Lal, R. (2008). Principles of Soil Conservation and Management. Netherland: Springer.

Chen, H., Zhang, X., Abla, M., Lü, D., Yan, R., Ren, Q., … Yang, X. (2018). Effects of vegetation and rainfall types on surface runoff and soil erosion on steep slopes on the Loess Plateau, China. Catena, 170, 141–149.

Chen, J., Xiao, H., Li, Z., Liu, C., Wang, D., Wang, L., & Tang, C. (2019). Threshold effects of vegetation coverage on soil erosion control in small watersheds of the red soil hilly region in China. Ecological Engineering, 132, 109–114.

Corona, R., Wilson, T., D’Addderio, L. P., Porcu, F., Montaldo, N., & Albertson, J. (2013). On the Estimation of Surface Runoff Through a New Plot Scale Rainfall Simulator in Sardinia Italy. Procedia Environmental Sciences, 19, 875 – 884.

Dirjen BPDASPS. Peraturan Direktur Jendral Bina Pengelolaan Daerah Aliran Sungai dan Perhutanan Sosial No. P4/V-SET/2013. , (2013).

Elhakeem, M., & Papanicolaou, A. N. (2009). Estimation of the Runoff Curve Number via Direct Rainfall Simulator Measurements in the State of Iowa, USA. Water Resources Management, 23, 2455–2473.

Fan, J., Yan, L., Zhang, P., & Zhang, G. (2015). Effects of grass contour hedgerow systems on controlling soil erosion in red soil hilly areas,Southeast China. International Journal of Sediment Research, 30, 107–116.

Farizi, F. A. (2019). Analisis Potensi Erosi dan Longsor berdasarkan Sifat Hidrofisik Tanah di Daerah Tangkapan Air Karangkobar, Banjarnegara. Universitas Gadjah Mada.

Foth, H. D. (1990). Fundamental of Soil Science (Eight Ed.). New York: John Wiley & Sons.

Guo, S., Zhu, Z., & Lyu, L. (2018). Effects of Climate Change and Human Activities on Soil Erosion in the Xihe River Basin, China. Water, 10(1085).

Iserloh, T., Fister, W., Seeger, M., Willger, H., & Ries, J. B. (2012). A Small Portable Rainfall Simulator for Reproductible Experiments on Soil Erosion. Soil & Tillage Research, 124, 131–137.

Iserloh, T., Ries, J. B., Arnáez, J., Boix-Fayos, C., Butzen, V., Cerdà, A., … Wirtz, S. (2013). European small portable rainfall simulators: A comparison of rainfall characteristics. Catena, 110, 100–112.

Magrath, W., & Arens, P. (1989). Cost of Soil Erosion on Java: A Natural Resource Accounting Approach. Washington DC.

Menteri Kehutanan RI. Surat Keterangan Menteri Kehutanan Nomor 328/Menhut-II/2009. , (2009).

Morgan, R. P. C. (2005). Soil Erosion & Conservation (Third Ed.). Oxford: Blackwell Publishing.

Negawo, A. T., Teshome, A., Kumar, A., Hanson, J., & Jones, C. S. (2017). Opportunities for Napier Grass (Pennisetum purpureum) Improvement Using Molecular Genetics. Agronomy, 7(28).

Paron, P., Rojas, R. V., Alim, M. S., Oduori, S. M., Monaci, L., Downie, M., & Ndubi, A. (2007). Swalim Field Survey Manual. Nairobi: Somalian Water and Land Information Management.

Plantvillage. (2019). Napier grass. Retrieved from plantvillage.psu.edu

Rymszewicz, A., O’Sullivan, J. J., Bruen, M., Turner, J. N., Lawler, D. M., Conroy, E., & Kelly-Quinn, M. (2017). Measurement differences between turbidity instruments, and their implications for suspended sediment concentration and load calculations: A sensor inter-comparison study. Journal of Environmental Management, 199, 99–108.

Sartori, M., Philippidis, G., Ferrari, E., Borelli, P., Lugato, E., Montanarella, L., & Panagos, P. (2019). A Linkage Between the Biophysical and the Economic: Assessing the Global Market Impacts of Soil Erosion. Land Use Policy, 86, 299–312.

Xiong, M., Sun, R., & Chen, L. (2018). Effects of soil conservation techniques on water erosion control: A global analysis. Science of the Total Environment, 645, 753–760.



DOI: https://doi.org/10.22146/agritech.50290

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