Model Indeks Kualitas Air Tanah sebagai Dasar Penentuan Alternatif Jenis Tanaman Pertanian pada Lahan Irigasi Air Tanah di Kabupaten Mojokerto

Abstract

The utilization of groundwater potential for irrigation has consequence for the high operational and maintenance costs of groundwater irrigation systems. One solution to these problems is the selection of high economic value crop types cultivated in groundwater irrigation lands. This study aims to determinate the alternative of types of agricultural crops that can be cultivated on groundwater irrigation land based on the quality of groundwater used as irrigation water based on the procedure: determination of groundwater quality index for irrigation, determination of types of agricultural crops based on criteria for tolerance to salt, adjustment of types of crop that have been determined with the criteria of high economic value crops, and adjustment to the types of crops that have been commonly cultivated by farmers in the local area. This procedure can be used as a solution to the absence of guidelines that can be used to determine alternative of types of agricultural plants on groundwater irrigation land. The results of this research showed the potential of ground water used as a source of irrigation water in the study site was dominated by groundwater with an index value of 70-85, where agricultural crops that could be recommended for planting were tolerant crops, moderately tolerant crops, and moderately sensitive crops to salt. The index value of groundwater quality for irrigation was mapped so obtained that zoning model of groundwater quality for irrigation and its suitability for the type of agricultural crops that can be cultivated.

Potensi Bahaya Salinitas Dan Bahaya Alkalinitas Air Irigasi Di Daerah Irigasi Mondoroko

“…Berdasarkan hasil perhitungan, nilai DHL 25 pada ketiga titik sampel berkisar dibawah < 250 µs/cm yang artinya termasuk potensi bahaya salinitas rendah. Memiliki potensi salinitas yang rendah berarti air irigasi mondoroko bisa digunakan pada hampir semua jenis tanaman [6].…”

“…Berdasarkan hasil perhitungan, nilai SAR pada ketiga titik sampel berkisar dibawah < 10 µs/cm yang artinya termasuk potensi bahaya alkalinitas rendah (S1). Memiliki potensi bahaya alkalinitas yang rendah berarti air irigasi mondoroko bisa digunakan pada hampir semua jenis tanah[6].3.3. Menentukan Jenis Tanaman Pertanian Yang Sesuai Dengan Kualitas Air IrigasiKesesuaian jenis tanah dan tanaman terhadap kualitas air irigasi ditentukan oleh nilai indeks kualiatas air irigasi (IWQI).…”

Determination of Suitable Plant Types in an Irrigation Command Area Using IWQI Method

“…The SAR value does not have a potential danger of sodium for agricultural land. According to (Siswoyo et al, 2020b) the SAR value represents the danger index of sodium in water used for irrigation. If irrigation water has a high SAR value, it will have a negative impact on soil and plants because the high sodium (Na + ) content can inhibit (Farruq, 2018).…”

Penilaian Kualitas Air Tanah di Kecamatan Jenu Kabupaten Tuban Berdasarkan Indeks Kualitas Air Irigasi

“…Untuk dapat digunakan sebagai air irigasi, air tanah harus memenuhi syarat kualitas air yang sesuai dengan peruntukannya. Hal ini dikarenakan kualitas air tanah tersebut dapat memberikan pengaruh bagi lahan pertanian (tanah dan tanaman) yang diari (Siswoyo et al, 2018). Penilaian kualitas air tanah untuk irigasi dapat dilakukan dengan menggunakan model indek kualitas air irigasi (model IWQI) berdasarkan 5 parameter dan perhitungan matematika (Meireles et al, 2010).…”