Hydrological drought index based on reservoir capacity – Case study of Batujai dam in Lombok Island, West Nusa Tenggara, Indonesia

Yasa, I Wayan; Bisri, Mohammad; Sholichin, Moh.; Andawayanti, Ussy

doi:10.2478/jwld-2018-0052

Cited by 12 publications

(8 citation statements)

References 15 publications

(10 reference statements)

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“…Pada Musim Kemarau 2015 rata-rata 50% bibit tanaman cabai mati pada awal musim tanam karena kekeringan. Untuk wilayah yang dilanda kekeringan dimana cadangan air irigasi lebih kecil dari penggunaannya perlu dilakukan pergiliran tanaman dan pemilihan varietas genjah (Estiningtyas et al 2012, Yasa et al 2018.…”

Section: Kekeringan DI Nusa Tenggara Barat (Ntb)unclassified

Daya Tahan Rumah Tangga Petani terhadap Kekeringan di Jawa Timur dan Nusa Tenggara Barat

Sayaka¹,

Wahida²,

Sudaryanto³

2019

j. agro ekon.

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External shock, such as drought, affects agricultural performance. Farmers should be resilient to external shock such that they keep producining or reducing risks amid climate uncertainty. This study was conducted in East Java and West Nusa Tenggara in 2016. Objectives of the study were: (a) to get data and information on drought affecting agricultural sector, especially, food crops and horticulture; (b) to estimate rice and chili farmers' resilience to drought; and (c) to assess government policy performance and impacts related measures dealing with drought. The measurement method is the resilient index modified from the vulnerability index. In 2015 drought took place in most provinces in Indonesia and affected food yield ranging from lower yield to dried-up. Chili farmers' resilience were better off than that of rice farmers in delaing with drought. The government tried to deal with drought through some effective actions, such as early warning to farmers, irrigation water allocation, Climate Field School, and water pump aid. Anticpatory and responsive measures are necessary such that drought impacts could be minimized. ABSTRAKGangguan eksternal seperti kekeringan sangat mempengaruhi kinerja sektor pertanian. Petani harus mempunyai daya tahan menghadapi gangguan eksternal agar tetap mampu berproduksi atau mengurangi risiko ditengah ketidakpastian iklim. Penelitian ini dilakukan di Jawa Timur dan Nusa Tenggara Barat pada tahun 2016. Tujuan penelitian adalah: (a) memperoleh data dan informasi tentang fenomena kekeringan sebagai salah satu faktor yang mempengaruhi sektor pertanian, khususnya pangan dan hortikultura; (b) mengukur daya tahan petani padi dan cabai terhadap dampak kekeringan; dan (c) mengetahui berbagai kinerja dan dampak kebijakan pemerintah dalam mengatasi kekeringan. Metode pengukuran dengan indeks daya tahan yang dimodifikasi dari vulnerability index. Pada tahun 2015 kekeringan melanda berbagai daerah di Indonesia menyebabkan hasil panen berkurang hingga puso. Daya tahan petani cabai umumnya lebih baik dari petani padi dalam menghadapi kekeringan. Pemerintah telah berusaha menanggulangi kekeringan antara lain dengan peringatan dini kepada petani, alokasi air irigasi, Sekolah Lapang Iklim, maupun bantuan pompa air. Tindakan antisipatif dan responsif perlu dilakukan agar dampak kekeringan dapat diminimalkan. PENDAHULUANKinerja sektor pertanian dan pangan sangat rawan terhadap gangguan (shocks) faktor-faktor eksternal. Gangguan tersebut meliputi banjir dan kekeringan, maupun krisis ekonomi dan finansial, serta konflik sosial-politik. Sebagian dari gangguan tersebut intensitasnya semakin tinggi dan frekuensinya semakin sering. Berbagai gangguan tersebut berdampak pada kehilangan atau kerusakan aset produktif, infrastruktur, produksi pertanian dan pangan, pendapatan rumah tangga serta status pangan dan gizi (Briguglio 2014, Hallegate et al. 2016. Penduduk miskin, petani kecil, wanita dan anak-anak adalah kelompok masyarakat yang paling rentan serta mengalami dampak paling serius. Rumusan kebijakan sekto...

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Section: Kekeringan DI Nusa Tenggara Barat (Ntb)unclassified

Daya Tahan Rumah Tangga Petani terhadap Kekeringan di Jawa Timur dan Nusa Tenggara Barat

Sayaka¹,

Wahida²,

Sudaryanto³

2019

j. agro ekon.

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“…One of the sources of water in Central Lombok is the Batujai Reservoir, located in Batujai Village, West Praya, Central Lombok Regency, West Nusa Tenggara Province, built in 1977Province, built in -1982 with a variation of the water depth of 6 -8 m, inundation area of 890 ha (Rahim and Soeprobowati, 2019). Has a gross capacity of 25  Received for publication February 25, 2019 Accepted after corrections April 7, 2019 million m 3 , effective capacity reaches 23.5•10 6 m 3 (Yasa et al, 2018) and minimum capacity reaches 1.4•10 6 m 3 . There are several main rivers that flow into the Batujai Reservoir, including the Leneng River, Tiwubare River and Sringangga River.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Water Losses Through Evapotranspiration of Water Hyacinth (Eichhornia crassipes)

Sasaqi

Pranoto

Setyono

2019

Caraka Tani J. Sustain. Agric.

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Batujai Reservoir locates in Batujai Village, Praya Barat, Central Lombok, West Nusa Tenggara. It is the primary source of irrigation water supply for agriculture in Central Lombok District with an area of around 3,235 ha. The problem is the bloom of water hyacinth weed (Eichhornia crassipes), which can cause reservoir water loss through evapotranspiration, affecting the amount of water reservoir available for the dry season. The objective was to identify the area of cover and estimate water loss through water hyacinth evapotranspiration for the period 2013 – 2017. This study used a descriptive method by analysis of secondary data which were meteorological data and landsat-8 satellite imagery. Evapotranspiration analyzes use CROPWAT 8.0, monitoring water hyacinth cover using landsat–8 satellite imagery processed using ENVI 5.3 and ArcGIS 10.4 software. The results show that the spatial distribution of water hyacinth can be detected and mapped accurately with an overall classification accuracy of 84.11% – 97.04% using Landsat 8 data, with a kappa coefficient of 0.80 – 0.96. The area of water hyacinth cover ranges from 38,400 m2 – 2,158,500 m2, with a cover area of more than 20%, causing water loss above 8,000 m3 day-1, which occurred in April 2013, April 2015, April 2016, February 2015, May 2014, May 2016 and July 2016, in those months it was seen that the amount of water loss was greater. Therefore, it is needed to suppress the growth of water hyacinth, in maintaining reservoir water storage capacity to support a systems of sustainable agriculture.

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“…Hydrological drought assessment was extensively established and applied to water resource development [94]. Various techniques have been recommended to analyse the hydrological drought characteristics such as low flow frequency, threshold level method and drought indices.…”

Section: Recommendation For Future Researchmentioning

confidence: 99%

Research Trends of Hydrological Drought: A Systematic Review

Hasan

Razali

Muhammad

et al. 2019

Water

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The frequency and severity of global drought-induced impacts have led to raising awareness of the need for improved river management. Although academic publications on drought have proliferated, a systematic review of literature has not yet been conducted to identify trends, themes, key topics, and authorships. This study aims to evaluate the scientific evidence for the hydrological drought characteristics and the methodologies by performing as a framework. This systematic review performed three-stage screening of literature review for current applicable hydrological drought studies that have been conducted since the year of 2000 concerning methodologies, literature research gaps, and trends, and contribute to future studies. The analysis shows the increasing trends of research and publications in the hydrological drought assessment. The primary research themes are hydrological drought is drought severity, drought vulnerability, and drought forecast. Despite the current research findings, spatial and temporal variability, low flow analysis and regional modelling are the most important to encourage a holistic approach and international collaborations. The finding identified the shortcomings of most research, which are the use of non-standardized methodological and distinct sample sizes, resulting in data summary challenges and unrealistic comparisons.

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Hydrological drought index based on reservoir capacity – Case study of Batujai dam in Lombok Island, West Nusa Tenggara, Indonesia

Cited by 12 publications

References 15 publications

Daya Tahan Rumah Tangga Petani terhadap Kekeringan di Jawa Timur dan Nusa Tenggara Barat

Daya Tahan Rumah Tangga Petani terhadap Kekeringan di Jawa Timur dan Nusa Tenggara Barat

Estimation of Water Losses Through Evapotranspiration of Water Hyacinth (Eichhornia crassipes)

Research Trends of Hydrological Drought: A Systematic Review

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