Water balance assessment of Sajnam watershed, Lalitpur (U.P.)

It is a well-known fact that it is not all possible to avoid droughts, but droughts can be managed to minimise the hardships of the local population. For this purpose, understanding of the supply-demand scenario is of utmost importance to understand the overall hydrology and planning needs of any watershed. It is in this direction, the comprehensive water balance analysis has been performed for the Sajnam watershed in Lalitpur district of Bundelkhand which is susceptible to regular and continuous droughts. The detailed water balance has been carried out after identification of important components and their quantification using the advance tools of Remote Sensing and GIS alongwith standard estimation techniques of individual components. It was observed that the runoff at the outlet of Sajnam basin is influenced by the water storage in the irrigation project located on the main river. The higher surface runoff of 668.53 MCM, 406.17 MCM, 343.46 MCM and 214.00 MCM is generated only during 2013-14, 2008-09, 2012-13 and 2010-11 respectively. During the remaining years, the runoff varied between 89.35 MCM and 209.81 MCM. Efforts can be initiated towards exploring the possibility of more water harvesting structures onthe lower order tributaries as well as artificial recharge measures depending on the hydro-geology of the watershed..

Download Full-text

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

Jurnal Purifikasi ◽

10.12962/j25983806.v15.i1.21 ◽

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.

Download Full-text

Impact Assessment of Water Harvesting Structures in Micro-Watersheds of Nira River Basin, Maharashtra, India

Hydrospatial Analysis ◽

10.21523/gcj3.19030203 ◽

2020 ◽

Vol 3 (2) ◽

pp. 72-89

Author(s):

Trupti Raskar ◽

Himanshu Gaikwad ◽

Omkar Kadekar ◽

Bhavana Umrikar

Keyword(s):

Artificial Recharge ◽

Degree Of Saturation ◽

Potential Zone ◽

Water Harvesting ◽

Groundwater Levels ◽

Level Data ◽

High Storage Capacity ◽

Dug Well ◽

The Impact ◽

Water Harvesting Structures

Artificial recharge is highly recommended in declining groundwater level trends as well as partially replenished aquifers. Moreover, the quantification of the recharge to aquifers due to such measures is important in water resource budgeting, development and planning. With this objective nine locations representing varied geomorphology were selected and the groundwater levels from the dug well in the proximity of water harvesting structures were monitored. The plot of monthly groundwater levels versus rainfall depicts that in the month of July high rainfall occurred but the groundwater levels raised in August due to delayed recharge process. The water level data also indicate the availability of water column of about 5m to 6m in most of the wells till the end of February, 2020. Water Harvesting structures overlaid on the Recharge Potential Zone map represent excellent (13.1%), very good (12.3%), good (23.3%), moderate (25.2) and poor (26.1) zones. The computation of artificial recharge from these structures depict that the structures having high storage capacity with a greater number of fillings have higher recharge. Also, the geophysical resistivity surveys were conducted to understand the degree of saturation at each location up to 50m, 100m and 150m distances from the structure. After integrating all datasets, it has been found that the structure at Shivajinagar has highest recharge followed by Pisalwadi, Kanheri, Zagalwadi 2, Kavathe, Ansur, Bholi, Limbachidwadi, Zagalwadi 1 and Kesurdi. Thus, the study concludes that the impact of water harvesting structures varies according to topography, land slope, geomorphology, size of catchment and lithology.

Download Full-text

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

Jurnal Natural ◽

10.30862/jn.v6i2.682 ◽

2008 ◽

Vol 6 (2) ◽

Author(s):

Baina Afkril

Keyword(s):

Water Balance ◽

Western Australia ◽

Groundwater Discharge ◽

Balance Analysis

Area studi terletak di bagian tenggara Dataran Tinggi Blackwood, Australia Barat mencakup 71 km2. 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 107 m3 a-1. 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-1.

Download Full-text