scholarly journals Study of meteorological drought and its impact on rainfed paddy productivity in Gunungkidul Regency

2021 ◽  
Vol 325 ◽  
pp. 01017
Author(s):  
Qooi Insanu Putra ◽  
Emilya Nurjani
Keyword(s):  
Spatial Analysis ◽  
Positive Relationship ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Rice Production ◽  
The Other ◽  
The Standardized Precipitation Index ◽  
The Impact ◽  
The Relationship ◽  
Special Region

Gunungkidul Regency is known as an area that often experiences drought. On the other hand, Gunungkidul Regency is also the regency with the highest amount of rice production in the Special Region of Yogyakarta Province. Rainfed paddy farming is the most widely developed type of paddy in Gunungkidul Regency where irrigation needs are determined by rainfall. Decreased rainfall that triggers meteorological drought can disrupt rainfed-based agriculture. This study aims to analyze the distribution of meteorological drought and analyze the impact of meteorological drought on rainfed paddy productivity in Gunungkidul Regency during the period 2001 – 2019. Meteorological drought identification was carried out using the Standardized Precipitation Index (SPI). Results of the SPI classification was mapped using Spline-Tension interpolation for spatial analysis of the distribution of meteorological drought. Spatial analysis and comparison graphs were used to analyze the relationship between drought and rainfed paddy productivity. The widest meteorological drought in Gunungkidul Regency occurred in November 2006. The highest frequency of drought events occurred in Paliyan Sub-district for 50 months while the lowest occurred in Ponjong Sub-district for 30 months. Most sub-districts in Gunungkidul Regency have a positive relationship between meteorological drought. Most of rainfed paddy productivity decreased when El Nino occurred.

Impact of meteorological drought on agriculture in the Tensift watershed of Morocco

2019 ◽  
Vol 11 (4) ◽  
pp. 1323-1338 ◽  
Author(s):  
Modeste Meliho ◽  
Abdellatif Khattabi ◽  
Guy Jobbins ◽  
Fathallah Sghir
Keyword(s):  
Agricultural Production ◽  
Temporal Evolution ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Water Shortage ◽  
Water Volume ◽  
Annual Crops ◽  
Irrigated Area ◽  
The Standardized Precipitation Index ◽  
The Impact

Abstract Located in the mid-west of Morocco, the Tensift watershed shelters the Takerkoust dam, which provides a part of the water used for irrigation of the N'fis agricultural area, which is an important irrigated area of the Tensift watershed. This study deals with the impact of droughts on water inflows to the Takerkoust dam and how the water shortage caused by droughts affects agricultural production in the N'Fis area. The standardized precipitation index (SPI) was used to illustrate the temporal evolution of drought periods. The trend observed on data showed that the Tensift watershed experienced a succession of droughts and humid periods of varying intensities. Periods of drought have negatively affected water inflows to the Takerkoust dam, and therefore the amount of water allocated to agricultural irrigation. Years that experienced droughts showed a restriction of more than 50% of water volume planned for irrigation. During periods of water scarcity, farmers reduce or completely avoid irrigation of annual crops to save water for irrigation of perennial crops. The water shortage for irrigation has led in some cases to a drop of up to 100% of the surface allocated to the production of annual crops.

scholarly journals Analysing 21st century meteorological and hydrological drought events in Slovakia

2018 ◽  
Vol 66 (4) ◽  
pp. 393-403 ◽  
Author(s):  
Miriam Fendeková ◽  
Tobias Gauster ◽  
Lívia Labudová ◽  
Dana Vrablíková ◽  
Zuzana Danáčová ◽  
...  
Keyword(s):  
Water Balance ◽  
Extreme Values ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
River Basins ◽  
Hydrological Drought ◽  
Water Balance Components ◽  
Extreme Values Distribution ◽  
The Standardized Precipitation Index ◽  
The Relationship

Abstract Several quite severe droughts occurred in Europe in the 21st century; three of them (2003, 2012 and 2015) hit also Slovakia. The Standardized Precipitation Index (SPI) and Standardized Precipitation and Evapotranspiration Index (SPEI) were used for assessment of meteorological drought occurrence. The research was established on discharge time series representing twelve river basins in Slovakia within the period 1981–2015. Sequent Peak Algorithm method based on fixed threshold, three parametric Weibull and generalized extreme values distribution GEV, factor and multiple regression analyses were employed to evaluate occurrence and parameters of hydrological drought in 2003, 2011–2012 and 2015, and the relationship among the water balance components. Results showed that drought parameters in evaluated river basins of Slovakia differed in respective years, most of the basins suffered more by 2003 and 2012 drought than by the 2015 one. Water balance components analysis for the entire period 1931–2016 showed that because of continuously increasing air temperature and balance evapotranspiration there is a decrease of runoff in the Slovak territory.

scholarly journals Relationship between meteorological and hydrological droughts in the upstream regions of the Lancang–Mekong River

2021 ◽  
Author(s):  
Jiqiu Li ◽  
Yinfei Wang ◽  
Yungang Li ◽  
Wenting Ming ◽  
Yunshu Long ◽  
...  
Keyword(s):  
Time Scale ◽  
Pearson Correlation ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Mekong River ◽  
Propagation Time ◽  
Wet Season ◽  
Evolution Characteristics ◽  
The Standardized Precipitation Index ◽  
The Relationship

Abstract Information on the relationship between meteorological drought (MD) and hydrological drought (HD) can serve as the basis for early warning and mitigation of HD. In this study, the standardized precipitation index and standardized streamflow index were applied to characterize MD and HD, respectively, and the evolution characteristics of MD and HD were assessed in the upstream regions of the Lancang–Mekong River (ULMR) from 1961 to 2015. Furthermore, the relationship between MD and HD was investigated using the Pearson correlation and wavelet analysis. The results revealed that (1) there was no significant change in the annual precipitation and streamflow; however, the ULMR experienced successive alternations of wet and dry episodes; (2) the average duration and magnitude of MD and HD increased with an increase in the time scale, while the duration and magnitude of MD lengthened and amplified in HD; (3) MD more likely propagated to HD as the time scale increased, and the propagation time exhibited marked seasonality, which was shorter in the wet season and longer in the dry season; and (4) there was a positive correlation between MD and HD; these two types of drought exhibited similar resonance frequency and phase-shift characteristics, and HD lagged behind MD.

scholarly journals Impact of climate change on drought in the Daklak province

2014 ◽  
Vol 17 (3) ◽  
pp. 5-11
Author(s):  
Khoi Nguyen Dao ◽  
Quang Nguyen Xuan Chau
Keyword(s):  
Climate Change ◽  
General Circulation ◽  
Standardized Precipitation Index ◽  
Circulation Model ◽  
Meteorological Drought ◽  
Impact Of Climate Change ◽  
The Future ◽  
Delta Change ◽  
The Standardized Precipitation Index ◽  
The Impact

The main objective of this study was to evaluate the impact of climate change on the meteorological drought in the Daklak province. In this study, the meteorological drought was calculated using the Standardized Precipitation Index (SPI).From this result, two scensrios fot the precipitation VA1B and B1 were downscaled, from the outputs of 4 GCMs (General Circulation Model): CGCM3.1 (T63), CM2.0, CM2.1, and HadCM3 using the simple downscaling method (delta change method). The impacts of climate change on the droughts were assessed by comparing the present (1980- 2009) and the future droughts (2010-2039, 2040-2069, and 2070-2099).Results of the study suggested that the future temperature would increase by 0.9-2.8ºC and the future precipitation would decrease by 0.4-4.7% for both A1B and B1 scenarios. Under the future climate scenarios, the frequency and severity of extreme drought would increase. The results obtained in this study could be useful for planning and managing water resources at this region.

scholarly journals INDEKS KEKERINGAN SPI (STANDARDIZED PRECIPITATION INDEX) DAN PENGARUHNYA TERHADAP PRODUKTIVITAS HORTIKULTURA TAHUNAN DI KABUPATEN JEMBER

2019 ◽  
Vol 2 (4) ◽  
pp. 149
Author(s):  
Arzaky Ardi Surya Nugroho ◽  
Cahyoadi Bowo ◽  
Joko Sudibya
Keyword(s):  
Standardized Precipitation Index ◽  
Correlation Method ◽  
Precipitation Index ◽  
World Meteorological Organization ◽  
Rainfall Data ◽  
Climate Fluctuations ◽  
Productivity Data ◽  
The Standardized Precipitation Index ◽  
The Impact ◽  
The Relationship

ABSTRACT Perennial tropical horticulture is a superior product whose productivity is affected by water availability. The impact of climate fluctuations due to global warming affects the availability of ground water. This study aims to determine the effect of the Standardized Precipitation Index (SPI) drought index derived from rainfall data on the productivity of perennial horticulture (durian, avocado and rambutan). The study was conducted from July 2016 - November 2018 in 9 sub-districts in Jember Regency where has the highest production. Rainfall data is proceed into SPI data according to the guidelines of the WMO (World Meteorological Organization). Productivity data derived from production data divided by the number of plants. The results of 12 monthly SPI calculations compared with the perennial horticultural productivity data. To find out the relationship between productivity and SPI, the correlation method is used. The results showed that the appropriate SPI value for observing annual horticultural productivity was SPI 9 and 12 monthly. The value of SPI greatly influences the correlation of productivity of durian, avocado and rambutan. Keywords: SPI, productivity, annual horticulture. ABSTRAK Tanaman hortikultura tropis tahunan adalah produk unggulan yang produktivitasnya dipengaruhi oleh ketersediaan air. Dampak fluktuasi iklim akibat pemanasan global mempengaruhi ketersediaan air tanah. Penelitian ini bertujuan untuk mengetahui pengaruh index kekeringan SPI yang berasal dari data curah hujan terhadap produktivitas hotikultura tahunan (durian, alpukat dan rambutan). Penelitian dilakukan mulai bulan Juli 2016 – November 2018 pada 9 Kecamatan dengan produksi tertinggi di Kabupaten Jember. Data curah hujan diolah menjadi data SPI sesuai pedoman WMO (World Meteorological Organization) dan data produktivitas berasal dari data produksi dibagi jumlah tanaman kemudian hasil perhitungan SPI 12 bulanan dibandingkan dengan data produktifitas hortikultura t ahunan. Untuk mengetahui hubungan produktivitas dan SPI digunkan metode korelasi. Hasil penelitian menunjukkan nilai SPI yang sesuai untuk mengamati produktivitas hortikultura tahunan adalah SPI 9 dan 12 bulanan. Nilai SPI sangat berpengaruh terhadap korelasi produktivitas durian, alpukat dan rambutan. Nilai SPI yang semakin tinggi menaikkan produktivitas durian, tetapi menurunkan produktivitas alpukat dan rambutan. Kata Kunci : SPI, produktifitas, hortikuktura tahunan

scholarly journals Impact of Agricultural Drought on Sunflower Production across Hungary

Atmosphere ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1339
Author(s):  
Endre Harsányi ◽  
Bashar Bashir ◽  
Firas Alsilibe ◽  
Karam Alsafadi ◽  
Abdullah Alsalman ◽  
...  
Keyword(s):  
Climate Change ◽  
Crop Production ◽  
Regional Scale ◽  
Standardized Precipitation Index ◽  
Agricultural Drought ◽  
Positive Trend ◽  
The Standardized Precipitation Index ◽  
The Impact ◽  
The Relationship ◽  
Sunflower Production

In the last few decades, agricultural drought (Ag.D) has seriously affected crop production and food security worldwide. In Hungary, little research has been carried out to assess the impacts of climate change, particularly regarding droughts and crop production, and especially on regional scales. Thus, the main aim of this study was to evaluate the impact of agricultural drought on sunflower production across Hungary. Drought data for the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI) were collected from the CARBATCLIM database (1961–2010), whereas sunflower production was collected from the Hungarian national statistical center (KSH) on regional and national scales. To address the impact of Ag.D on sunflower production, the sequence of standardized yield residuals (SSYR) and yield losses YlossAD was applied. Additionally, sunflower resilience to Ag.D (SRAg.D) was assessed on a regional scale. The results showed that Ag.D is more severe in the western regions of Hungary, with a significantly positive trend. Interestingly, drought events were more frequent between 1990 and 2010. Moreover, the lowest SSYR values were reported as −3.20 in the Hajdu-Bihar region (2010). In this sense, during the sunflower growing cycle, the relationship between SSYR and Ag.D revealed that the highest correlations were recorded in the central and western regions of Hungary. However, 75% of the regions showed that the plantation of sunflower is not resilient to drought where SRAg.Dx < 1. To cope with climate change in Hungary, an urgent mitigation plan should be implemented.

scholarly journals Vulnerability of Amazonian forests to repeated droughts

2018 ◽  
Vol 373 (1760) ◽  
pp. 20170411 ◽  
Author(s):  
Liana Oighenstein Anderson ◽  
Germano Ribeiro Neto ◽  
Ana Paula Cunha ◽  
Marisa Gesteira Fonseca ◽  
Yhasmin Mendes de Moura ◽  
...  
Keyword(s):  
Vegetation Index ◽  
Photosynthetic Capacity ◽  
Atmospheric Correction ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Water Shortage ◽  
Moderate Resolution Imaging Spectroradiometer ◽  
The Standardized Precipitation Index ◽  
Amazonian Forests ◽  
The Impact

Extreme droughts have been recurrent in the Amazon over the past decades, causing socio-economic and environmental impacts. Here, we investigate the vulnerability of Amazonian forests, both undisturbed and human-modified, to repeated droughts. We defined vulnerability as a measure of (i) exposure, which is the degree to which these ecosystems were exposed to droughts, and (ii) its sensitivity, measured as the degree to which the drought has affected remote sensing-derived forest greenness. The exposure was calculated by assessing the meteorological drought, using the standardized precipitation index (SPI) and the maximum cumulative water deficit (MCWD), which is related to vegetation water stress, from 1981 to 2016. The sensitivity was assessed based on the enhanced vegetation index anomalies (AEVI), derived from the newly available Moderate Resolution Imaging Spectroradiometer (MODIS)/Multi-Angle Implementation of Atmospheric Correction algorithm (MAIAC) product, from 2003 to 2016, which is indicative of forest's photosynthetic capacity. We estimated that 46% of the Brazilian Amazon biome was under severe to extreme drought in 2015/2016 as measured by the SPI, compared with 16% and 8% for the 2009/2010 and 2004/2005 droughts, respectively. The most recent drought (2015/2016) affected the largest area since the drought of 1981. Droughts tend to increase the variance of the photosynthetic capacity of Amazonian forests as based on the minimum and maximum AEVI analysis. However, the area showing a reduction in photosynthetic capacity prevails in the signal, reaching more than 400 000 km 2 of forests, four orders of magnitude larger than areas with AEVI enhancement. Moreover, the intensity of the negative AEVI steadily increased from 2005 to 2016. These results indicate that during the analysed period drought impacts were being exacerbated through time. Forests in the twenty-first century are becoming more vulnerable to droughts, with larger areas intensively and negatively responding to water shortage in the region. This article is part of a discussion meeting issue ‘The impact of the 2015/2016 El Niño on the terrestrial tropical carbon cycle: patterns, mechanisms and implications’.

scholarly journals Developing Objective Operational Definitions for Monitoring Drought

2009 ◽  
Vol 48 (6) ◽  
pp. 1217-1229 ◽  
Author(s):  
Steven M. Quiring
Keyword(s):  
Water Conservation ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Severity Index ◽  
Decision Makers ◽  
Drought Severity ◽  
Specific Method ◽  
The Standardized Precipitation Index ◽  
Spatially Variant ◽  
Objective Methodology

Abstract Drought is a complex phenomenon that is difficult to accurately describe because its definition is both spatially variant and context dependent. Decision makers in local, state, and federal agencies commonly use operational drought definitions that are based on specific drought index thresholds to trigger water conservation measures and determine levels of drought assistance. Unfortunately, many state drought plans utilize operational drought definitions that are derived subjectively and therefore may not be appropriate for triggering drought responses. This paper presents an objective methodology for establishing operational drought definitions. The advantages of this methodology are demonstrated by calculating meteorological drought thresholds for the Palmer drought severity index, the standardized precipitation index, and percent of normal precipitation using both station and climate division data from Texas. Results indicate that using subjectively derived operational drought definitions may lead to over- or underestimating true drought severity. Therefore, it is more appropriate to use an objective location-specific method for defining operational drought thresholds.

Tolstoy in a recipe

2014 ◽  
Vol 44 (4) ◽  
pp. 310-323 ◽  
Author(s):  
Ana Tominc
Keyword(s):  
Design Methodology ◽  
The Other ◽  
Food Culture ◽  
Content Type ◽  
Current Trends ◽  
New Middle Class ◽  
Cooking Shows ◽  
Local Construction ◽  
The Impact ◽  
The Relationship

Purpose – The purpose of this study is to demonstrate the impact of global celebrity chefs and their discourse about food on the genre of cookbooks in Slovenia. Design/methodology/approach – Focusing this discourse study on cookbook topics only, the analysis demonstrates the relationship between the aspirations of local celebrity chefs for the food culture represented globally by global celebrity chefs, such as Oliver, and the necessity for a local construction of specific tastes. While the central genre of TV celebrity chefs remains TV cooking shows, their businesses include a number of side products, such as cookbooks, which can be seen as recontexualisations of TV food discourse. Findings – Hence, despite this study being limited to analysis of cookbooks only, it can be claimed that the findings extend to other genres. The analysis shows that local chefs aspire to follow current trends, such as an emphasis on the local and sustainable production of food as well as enjoyment and pleasure in the form of a postmodern hybrid genre, while, on the other hand, they strive to include topics that will resonate locally, as they aim to represent themselves as the “new middle class”. Originality/value – Such an analysis brings new insights into the relationship between discourse and globalisation as well as discourse and food.

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