scholarly journals ANALISIS NERACA AIR UNTUK PENETAPAN PERIODE TANAM TANAMAN PANGAN DI PROPINSI BANTEN (ANALYSIS OF WATER BALANCE FOR DETERMINE GROWING PERIODS OF FOOD CROPS IN BANTEN PROVINCE)

Agromet ◽  
2006 ◽  
Vol 20 (1) ◽  
pp. 44
Author(s):  
T. Hidayat ◽  
Yonny Kusmaryono ◽  
A. Pramudia
Keyword(s):  
Land Use ◽  
Water Balance ◽  
Water Supply ◽  
Food Crops ◽  
Food Crop ◽  
Planting Dates ◽  
High Rainfall ◽  
Modified Method ◽  
Balance Analysis

<p>Growing periods can be determined using water balance analysis to decrease harvest risk in certain area. Generally, there are two types of land use for crop, irrigated land and non-irrigated land. The experiment aims to determine growing periods of food crop in Banten Province. Modified method of Thornthwaite and Mather of bookkeeping system of water balance has been used base on decades data. Water balance analysis of irrigated land showed that in the area of Serang District has growing periods potencially of 140-170 days with growing periods starting from Dec2 till Jan1, but necessary need water supply from irrigation as amount 8.5-22.5 mm to growing rise twice a year or planted with other food crops after rice if no irrigation. Meanwhile in Tangerang District (Pakuhaji) and Pandeglang District (Pagelaran) has potency of 182-193 days of growing periods with starting on Sep3 at Pakuhaji and on Dec3 at Pagelaran. In these area rice can be planted twice a year without irrigation. Futhermore, for non-irrigation/land with monthly high rainfall, the analysis indicated that the area has potency of growing periods of 182 days as even through the year. Planting dates can be started from Oct1 till Dec1, with sequence of rice-rice or rice-rice-other food crops.</p>

scholarly journals HUBUNGAN ANTARA WAKTU TANAM DENGAN HASIL DAN PROFITABILITAS BUDIDAYA KENTANG (Solanum tuberosum l.) DI CIKAJANG, GARUTRELATIONSHIPS BETWEEN PLANTING TIME AND YIELD AS WELL AS PROFITABILITY OF GROWING POTATO ...

Agromet ◽  
2010 ◽  
Vol 24 (1) ◽  
pp. 9
Author(s):  
Rakhmat Hanafi Ajis ◽  
I Handoko
Keyword(s):  
Water Balance ◽  
Soil Water ◽  
Water Availability ◽  
Coefficient Of Variation ◽  
Rainfall Variability ◽  
The Other ◽  
Planting Dates ◽  
Planting Time ◽  
High Rainfall ◽  
Balance Analysis

Relationships between planting time and yield as well as profitability of growing potato were investigated in Cikajang, Garut, based on water balance analysis and survey to potato farmers of the area. In general, there were three planting dates namely December-January, April-May and August-September. Yield and profitability of growing potato for planting time of August-September was less compared to the other two planting times due to lack of soil-water availability related to less rainfall as well as its high rainfall variability during dry season (coefficient of variation = 133%). Yields of potato for planting times December-January, April-May and August-September were (21.4 + 3.4), (20.5 + 3.5) and (16.9 + 2.2) tonnes/ha, respectively.Relationships between planting time and yield as well as profitability of growing potato were investigated in Cikajang, Garut, based on water balance analysis and survey to potato farmers of the area. In general, there were three planting dates namely December-January, April-May and August-September. Yield and profitability of growing potato for planting time of August-September was less compared to the other two planting times due to lack of soil-water availability related to less rainfall as well as its high rainfall variability during dry season (coefficient of variation = 133%). Yields of potato for planting times December-January, April-May and August-September were (21.4 + 3.4), (20.5 + 3.5) and (16.9 + 2.2) tonnes/ha, respectively.

scholarly journals Afforestation of Degraded Croplands as a Water-Saving Option in Irrigated Region of the Aral Sea Basin

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1433
Author(s):  
Navneet Kumar ◽  
Asia Khamzina ◽  
Patrick Knöfel ◽  
John P. A. Lamers ◽  
Bernhard Tischbein
Keyword(s):  
Land Use ◽  
Water Balance ◽  
Water Supply ◽  
Water Availability ◽  
Irrigation Water ◽  
Water Saving ◽  
Aral Sea ◽  
Water Balance Components ◽  
Study Region ◽  
Trade Offs

Climate change is likely to decrease surface water availability in Central Asia, thereby necessitating land use adaptations in irrigated regions. The introduction of trees to marginally productive croplands with shallow groundwater was suggested for irrigation water-saving and improving the land’s productivity. Considering the possible trade-offs with water availability in large-scale afforestation, our study predicted the impacts on water balance components in the lower reaches of the Amudarya River to facilitate afforestation planning using the Soil and Water Assessment Tool (SWAT). The land-use scenarios used for modeling analysis considered the afforestation of 62% and 100% of marginally productive croplands under average and low irrigation water supply identified from historical land-use maps. The results indicate a dramatic decrease in the examined water balance components in all afforestation scenarios based largely on the reduced irrigation demand of trees compared to the main crops. Specifically, replacing current crops (mostly cotton) with trees on all marginal land (approximately 663 km2) in the study region with an average water availability would save 1037 mln m3 of gross irrigation input within the study region and lower the annual drainage discharge by 504 mln m3. These effects have a considerable potential to support irrigation water management and enhance drainage functions in adapting to future water supply limitations.

Understanding the Nexus between Climate Change, the Shift in Land Use toward Cashew Production and Rural Food Security in Ghana; the Experiences of Farmers in the Transition Zone of Ghana

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Victor Adjei ◽  
Moses Ackah Anlimachie
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Food Security ◽  
Crop Production ◽  
Structured Interview ◽  
Food Crops ◽  
Food Crop ◽  
Crop Failure ◽  
Small Holding ◽  
Study District

This study summarises the findings from a study investigating rural small-holding farmers’ experiences on the shift from food crop to cashew in the forest/savanna transitional agro-ecological zone of Ghana and its impact on rural food security. Using a mix method approach, the study sampled the views of 400 farmers from 9 farming communities in the Wenchi Municipality of Ghana via questionnaire and semi-structured interview and collated statistical data on crop production to trace the nexus between climate change, agrarian land-use decisions and food security. The study found evidence of increasing shift from food crop to cashew production. This was evidenced by increasing cashew cultivation and cashew output and decreasing total land acreage for food crops and increasing food insecurity of farmers. The findings revealed that about 71% of farmers had expanded their cashew farms and another 41.0% have turned their food crops’ lands to cashew production. Besides cashew production, (57.0%) has overtaken the traditional food crop -maize (25.5%) production in terms of output.  Instructively, the study found that the main motivation for the shift from food crop to cashew production is not only to maximise income in bulk, but also climate change adaptability issues. The study found that the cashew crop is resilient in adapting to the changing climate and less prone to pests’ invasion compared to maize in the study District. The study found that food security among rural folks had been seriously compromised by the conversion of farmlands from food crop to cashew farming. Although, the study found that female farmers have higher consciousness to food security yet less motivated to shift from food crop to cashew crop production compared to men.  Worryingly, females are the hardest hit group because of their low ownership of or access to farmlands and low voices of women in farmland use decision making in a men-dominant rural extended family setting of the study District. The study concludes that climate change adaptability concern has introduced a new set of risks including crop failure due to changing rainfall pattern and increasing incidence of pest invasions forcing the rural folks to compromise innovative indigenous farming focus and practices that have helped them to navigate extreme food poverty. This study, therefore, argues for improved food crop seeds tailored to the specific climatic context and innovative farming practices that beef-up small-holding farmers’ capacity to navigate climate change to continually produce food crop to ensure rural food security and sustainability.

scholarly journals Measurement of Groundwater Penetration and Water Balance Analysis according to Land Use Materials

2021 ◽  
Vol 22 (8) ◽  
pp. 613-622
Author(s):  
Jinkwan Son ◽  
Taekeun Kwon ◽  
Minjae Kong ◽  
Taegyeong Kang ◽  
Ryugap Lim ◽  
...  
Keyword(s):  
Land Use ◽  
Water Balance ◽  
Balance Analysis

scholarly journals The Implementation of Grey Forecasting Model for Forecast Result�s Food Crop Agricultural

2016 ◽  
Vol 3 (2) ◽  
pp. 159-166
Author(s):  
Asfan Muqtadir ◽  
Suryono Suryono ◽  
Vincensius Gunawan
Keyword(s):  
Land Use ◽  
Agricultural Production ◽  
Crop Production ◽  
Forecasting Model ◽  
Food Crops ◽  
Food Crop ◽  
Limited Data ◽  
Grey Forecasting ◽  
Lack Of Information ◽  
Forecast Result

The increasing of the needs of food crops raised several issues related to land use. The problems of land used caused by the lack of information related to productivity and eligibility used of land. The goal of this research is to implementation a model of Grey forecasting GM(1,1) to forecast agricultural production, especially in food crops. GM(1,1) is used to built a model with limited data samples and generate good forecasts for short libertine forecasts. This research uses data from the production of food crops for the 2004-2013 it can be calculated by using the model of GM (1,1). The results showed the model GM (1,1) can produce highly accurate forecasts, from the experimental results for pattern trends generate value ARPE 5.74% or accuracy of forecasts reached 94.26% in crop production.

scholarly journals Rekomendasi Manajemen Lingkungan di Daerah Aliran Sungai Dondong, Kecamatan Nglipar, Kabupaten Gunungkidul sebagai Mitigasi Bencana Kekeringan

2015 ◽  
Vol 15 (1) ◽  
pp. 12-22
Author(s):  
Retno Wulandari ◽  
Nurmaliyatul Khayah
Keyword(s):  
Land Use ◽  
Water Balance ◽  
Water Deficit ◽  
Water Availability ◽  
Agricultural Sector ◽  
Local Population ◽  
Land Use Management ◽  
Land Capability ◽  
Watershed Land Use ◽  
Balance Analysis

Daerah Aliran Sungai (DAS) Dondong terletak di Kecamatan Nglipar, Kabupaten Gunungkidul, D.I. Yogyakarta. DAS Dondong terdiri dari beberapa Bentuk lahan dengan variasi bentuk penggunaan lahan. DAS ini mengalami ketimpangan penggunaan lahan yaitu adanya ketidaksesuaian antara penggunaan lahan dengan kemampuan lahan yang ada. Hal ini diperparah oleh ketersediaan air meteorologis yang kurang, sehingga memicu terjadinya kekeringan. Kekeringan dapat mempengaruhi aktivitas penduduk setempat yang sebagian besar bekerja di sektor pertanian, sehingga diperlukan adanya manajemen terhadap penggunaan lahan DAS Dondong. Manajemen lingkungan DAS yang dilakukan didasarkan pada satuan Bentuk lahan yang ada di dalam DAS. Metode yang digunakan dalam penelitian ini adalah Neraca Air Throntwaite dan Subjective Matching Factors terhadap kemampuan dan kesesuaian lahan. Berdasarkan hasil Neraca Air dengan curah hujan probabilitas 60%, DAS Dondong mengalami defisit air selama 11 bulan. Setelah dilakukan rekomendasi terhadap penggunan lahan yang disesuaikan dengan kemampuan dan kesesuaian lahan, maka ketersediaan air meteorologis dihitung kembali menggunakan Neraca Air. Neraca Air hasil rekomendasi penggunaan lahan menunjukan bahwa kekeringan yang terjadi dapat dikurangi. Hal ini menggambarkan adanya hubungan antara Bentuk lahan, penggunaan lahan, dan kekeringan di DAS Dondong. Dondong watershed is located in Nglipar Sub-district, Gunungkidul District, D.I. Yogyakarta. Dondong watershed consist of several landforms with its land use variation. Unsuitable land use between actual land use and land capability is the major issue in this Watershed. This problem become more complicated because of the meteorological water availability is less than its use. Drought may affect the activity of the local population, mostly working in the agricultural sector. Thus, it is necessarily to manage the land use in this watershed. Land use management in watershed is based on landform analysis. The methods used in this research are Thronthwaite Water Balance and Subjective Matching Factors to land capability and suitability. Based on the results of water balance analysis with precipitation probability of 60%, Dondong watershed deficit for 11 months. This water balance is recalculated by the result of land use recommendation. The water deficit can be decreased trough this land use recommendation. This research shows the relation between landform, land use, and drought in Dondong Watershed.

scholarly journals Development and Utility Evaluation of a Multi-Composite Water Balance Model

2020 ◽  
Vol 20 (2) ◽  
pp. 239-250
Author(s):  
Yonghyeon Gwon ◽  
Kyunghwan Son ◽  
Kyoungdo Lee ◽  
Gyewoon Choi
Keyword(s):  
Water Balance ◽  
Water Supply ◽  
River Basin ◽  
Model Simulation ◽  
Water Balance Model ◽  
Weather Data ◽  
Balance Model ◽  
Reservoir Water ◽  
Balance Analysis ◽  
Daily Water

This study aimed to develop a water balance model capable of daily analysis of the water supply situation in a multi-composite area, evaluate the utility of the model, and conduct a water balance analysis. The multi-composite water balance model, which was developed to determine the daily water balance in an area, includes five modules: "Weather data build and area mean data," "Rainfall-runoff analysis," "Benefit area and demand estimation," "Reservoir water balance analysis," and "River basin water balance analysis." The study selected eight cities in northwestern Chungcheongnam-do in Korea as target areas and evaluated the utility of the water balance model. Further, the study used observation and model simulation data for its analysis, which found a high degree of accuracy as well as correlation. In addition, daily water balance analysis was conducted to estimate the potential supply, demand, supply, shortage, surplus supply, and shortage days in the river basin, while the ratio of shortage to demand was also determined to identify areas vulnerable to drought. In the future, it will be possible to establish drought countermeasures and facility operation plans by identifying areas with water supply vulnerability using the developed model.

scholarly journals Water Allocation Efforts with Water Balance Analysis in the Jatiroto Sub-Watershed and Asem Sub Watershed, Lumajang Districts

2021 ◽  
Vol 9 (1) ◽  
pp. 11
Author(s):  
Gunawan Eko Prihantono ◽  
Gusfan Halik ◽  
Entin Hidayah
Keyword(s):  
Water Balance ◽  
Water Supply ◽  
Water Availability ◽  
Water Demand ◽  
Water Allocation ◽  
Agricultural Water ◽  
Planning Program ◽  
Balance Analysis ◽  
River Reach ◽  
The Impact

Currently, water demand is increasing, both domestic, industrial and agricultural water needs. However, the increase in water demand is not due to an increase in the water availability due to changes in land use and other factors that pose a threat to increased exploitation of water resources. So it is necessary to analyze and evaluate the water needs to anticipate the impact of drought in the Asem-Tekung-Jatirowo sub watersheds. The calculation of water supply and water demand can be carried out using the water balance method, assisted by the WEAP (Evaporation and Water Planning) program, through data integration of streamflow analysis and water user in the river reach. The results showed that the sub-watershed area showed a deficit of water in 2013, with the Jatiroto region having the highest air deficit of 1.58 million m3 or 44.2%. Based on this analysis, urgently needed a recommendation of drought anticipation strategies these are planting patterns to adjust condition of water supply, storage of water reserves, conservation of critical land, and repair of channels that are at risk of water seepage.

EVALUATION OF THE GROUNDWATER DISCHARGE FROM THE YARRAGADEE FORMATION INTO THE BLACKWOOD RIVER, BLACKWOOD PLATEAU, WESTERN AUSTRALIA USING WATER BALANCE ANALYSIS

2008 ◽  
Vol 6 (2) ◽  
Author(s):  
Baina Afkril
Keyword(s):  
Water Balance ◽  
Western Australia ◽  
Groundwater Discharge ◽  
Balance Analysis

<p>Area studi terletak di bagian tenggara Dataran Tinggi Blackwood, Australia Barat mencakup 71 km<sup>2</sup>. Akifer Yarragadee di daerah studi utamanya tersusun oleh batu pasir yang mengandung lapisan-lapisan batu lempung dan liat. Akifer ini merupakan akifer tak-tertekan karena muncul dipermukaan sepanjang alur Sungai Blackwood pada daerah hilir di Nannup dan merupakan sumber airtanah yang keluar ke sungai. Sungai Blackwood mengalir melintasi Dataran Tinggi Blackwood. Selama musim kering, aliran permukaan ke dalam Sungai Blackwood dapat diabaikan, namun aliran dasar dari airtanah menjadi sumber utama bagi aliran sungai. Neraca air pada daerah studi dilakukan dengan menggunakan analisa jaring-aliran dan kesetimbangan air guna mengevaluasi masukan airtanah dari akifer Yarragadee ke dalam Sungai Blackwood. Mayoritas sel-sel jaring-aliran adalah sel-sel keluaran dan kebanyakan aliran airtanah masuk ke dalam Sungai Blackwood di daerah studi. Curah hujan rata-rata tahunan area studi sekitar 6.7 x 10<sup>7</sup> m<sup>3</sup> a<sup>-1</sup>. Sekitar 9 % dari total curah hujan rata-rata tahunan ini masuk ke dalam tanah sebagai sumber bagi air tanah dan 91 % hilang melalui proses evapotranspirasi. Volume total airtanah yang masuk ke dalam Sungai Blackwood antara stasiun Darradup dan Layman Flat yang dihitung menggunakan analisis jarring-aliran dan kesetimbangan air sekitar 8.1 GL a<sup>-1</sup>.  </p>

The effect of livestock on the concentration of nitrogen in stream water

1994 ◽  
Vol 30 (7) ◽  
pp. 167-170 ◽  
Author(s):  
Motoko Shimura ◽  
Toshio Tabuchi
Keyword(s):  
Land Use ◽  
Water Supply ◽  
Stream Water ◽  
Nitrogen Concentration ◽  
Stocking Density ◽  
Specific Load

Recently NO3-N concentrations of the rivers that flow into the Kasumigaura lake have increased. The lake is much eutrophicated and is used as a source of water supply for Tsuchiura-city. Stocking density and NO3-N specific load have a high correlation (r=0.93). NO3-N concentrations increase corresponding to the increase of stocking density. In this area the livestock has a larger influence to the nitrogen concentration of the rivers than the land use.

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