scholarly journals Land use and environment physical condition on sedimentation and water discharge of lindu lake watershed

2019 ◽  
Author(s):  
Ramlan
Keyword(s):  
Land Use ◽  
Physical Condition ◽  
Water Discharge

scholarly journals ECOSYSTEM SERVICE ASSESSMENT IN AGRICULTURAL WATERSHED BY USING TOPMODEL

AGROFOR ◽  
2018 ◽  
Vol 2 (3) ◽  
Author(s):  
Kosuke MUKAE ◽  
Koji MIWA ◽  
Hiromu OKAZAWA ◽  
Tomonori FUJIKAWA
Keyword(s):  
Land Use ◽  
River Discharge ◽  
Flood Control ◽  
Human Life ◽  
Water Discharge ◽  
Heavy Rain ◽  
Agricultural Watershed ◽  
Sudden Increase ◽  
Millennium Ecosystem Assessment ◽  
Different Types

In Millennium Ecosystem Assessment established by the United Nations, theecosystem services (ES) provide benefits for human life as well as theenvironment. There is “regulating services” among all the supporting services. As aregulatory service, forests alleviate the flood risk after heavy rain by storingrainfall temporarily into forestlands and prevent the sudden increase in riverdischarge. The purpose of this research is to develop a hydrological modelling toassess this service in a watershed where consists of not only forestland but alsograssland. TOPMODEL is applied for the quantification. This model was inventedto forecast river discharge in watersheds where the land use is uniform. However,the model has not been applied to a watershed where agricultural and forest areaare mixed in Japan. This research aimed to develop TOPMODEL to apply to suchcomplexed land use. Because the targeted watershed is consisted of two land-usetypes, TOPMODEL was applied in each grassland and forestland. It predicted theriver discharge by combining the predicted discharge from the different types ofland calculated by TOPMODEL. The result confirmed that by developing themodel, it was able to assess the water discharge from the both grassland andforestland in a watershed. The developed model also showed the betterreproducibility of river-discharge prediction than the conventional TOPMODEL.In addition, it clarified that the forestland stores more water than grassland into theground. Therefore, the effect of flood control which is the regulatory service of ESwas assessable through the developed model.

scholarly journals Analisis Dampak Perubahan Tataguna Lahan Sub DAS Beringin di Bukit Semarang Baru Terhadap Peningkatan Debit Sungai Beringin Kota Semarang

2017 ◽  
Vol 19 (1) ◽  
pp. 31-38
Author(s):  
Sumiyadi -
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Impact Analysis ◽  
Water Discharge ◽  
Research Result ◽  
Daily Rainfall ◽  
Runoff Water ◽  
Watershed Area ◽  
Rainfall Frequency ◽  
Housing Area

The changes of landuse in watershed area of Beringin river, from rubber forest into housing area of Bukit Semarang Baru (BSB), is suspected as the cause of increase in water discharge into Beringin river. The research objective is to describe the rise in water discharge of Beringin river due to the changes of landuse in the watershed area of Beringin river which currently inhibited by BSB housing. According to statistics criteria, the distribution of maximum daily rainfall frequency for repeated period of 2, 5, 10 and 20 years was analyzed by distribution frequency Gumbel. Research result shows that there is an increase in water discharge of Beringin river due to the rise of runoff water as the consequence of land use change in BSB area. Ten years discharge before the land use change was = 7,94 m /dt, then raised into 113,49 m3 /dt following the change, so the water discharge of Beringin river is = 121,43 m3 /dt. This impact analysis can be an early information for the future researcher to find the solution of flood phenomena in Semarang.Perubahan tataguna lahan di sub DAS Beringin, dari hutan karet menjadi kawasan hunian Bukit Semarang Baru (BSB) diduga penyebab meningkatnya aliran limpasan yang masuk sungai Beringin. Tujuan penelitian untuk mengetahui peningkatan debit sungai Beringin, akibat dari perubahan tataguna lahan sub DAS Beringin di kawasan hunian BSB. Berdasarkan kriteria statistik, distribusi frekuensi hujan harian maksimum untuk periode ulang 2, 5, 10, dan 20 tahunan dilakukan analisis frekuensi agihan Gumbel. Hasil penelitian menunjukkan terjadi peningkatan debit di sungai Beringin karena bertambahnya aliran limpasan akibat dari perubahan tata guna lahan di kawasan BSB. Debit 10 tahunan sebelum perubahan tataguna lahan Q10 = 7,94 m3 /dt, setelah perubahan ada tambahan debit 113,49 m3 /dt, sehingga debit sungai beringin menjadi Q10 = 121,43 m3 /dt. Analisa dampak ini sebagai informasi awal bagi para peneliti, untuk mencari solusi terhadap masalah banjir di Semarang.

scholarly journals Estimation of sediments produced in a subbasin using the Normalized Difference Vegetation Index

2020 ◽  
Vol 44 ◽  
Author(s):  
Guilherme Henrique Expedito Lense ◽  
Rodrigo Santos Moreira ◽  
Fernanda Almeida Bócoli ◽  
Junior Cesar Avanzi ◽  
Alexandre Elias de Miranda Teodoro ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Loss ◽  
Vegetation Index ◽  
Management Practices ◽  
Normalized Difference Vegetation Index ◽  
Water Discharge ◽  
Chemical Properties ◽  
Water Erosion ◽  
Mitigation Measures ◽  
Factor C

ABSTRACT Among the parameters considered by the Revised Universal Soil Loss Equation (RUSLE), the soil cover and management factor (C) is the main human influenced factor affecting the estimation of water erosion, and one of the most sensitive to spatiotemporal variations. Consequently, this study aims to compare the efficiency of C factor estimates obtained from the literature for each land-use class (Clit) and by calculation based on the Normalized Difference Vegetation Index (CNDVI). We test the hypothesis that soil loss estimates based on CNDVI approach are more accurate than those based on Clit. Water erosion was estimated based on soil morphological, physical, and chemical properties in addition to climate, relief, management practices, and land use and cover. The modeling steps were realized with the help of the Geographic Information System. The results were validated using the data of total sediment transported with water discharge and daily runoff. RUSLE underestimated soil losses by 0.64 Mg ha-1 year-1 using Clit and 0.45 Mg ha-1 year-1 with CNDVI, which corresponds to errors of 21.05% and 14.80%, respectively. Therefore, the CNDVI factor results are more accurate. Both methodologies identified areas with high erosion rates where the adoption of mitigation measures should be prioritized.

scholarly journals Contemporary Trends in River Flow, Suspended Sediment Load, and Soil/Gully Erosion in the South of the Boreal Forest Zone of European Russia: The Vyatka River Basin

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2567
Author(s):  
Artyom V. Gusarov ◽  
Aidar G. Sharifullin ◽  
Achim A. Beylich
Keyword(s):  
Land Use ◽  
Suspended Sediment ◽  
River Basin ◽  
Sediment Load ◽  
Water Discharge ◽  
East European Plain ◽  
Suspended Sediment Load ◽  
Forest Zone ◽  
East European ◽  
Erosion Intensity

Recent decades in the north of the East European Plain have been characterized by significant changes in climate and land use/cover, especially after the collapse of the USSR in 1991. At the same time, the hydrological consequences of these changes, especially changes in erosion processes and river sediment load, have been studied insufficiently. This paper partially covers this existing knowledge gap using the example of the Vyatka River basin. Draining an area of 129,000 km2, the Vyatka River is among the largest rivers in the boreal forest zone of European Russia. Cultivated land occupies about one-fifth of the river basin area; about three-fourths is covered by taiga forest vegetation. The results of state long-term hydrometeorological monitoring and information on land use/cover made it possible to reveal contemporary (since the 1960s) hydrological and erosion-intensity trends and their drivers within the greater (96%) part of the river basin. There has been a statistically insignificant increase in water discharge in the Vyatka River basin during recent decades. This is due to a statistically insignificant increase (for the entire basin studied) in the spring snowmelt-induced floodwater flow and a statistically significant rise in the discharge in the year’s warm and cold seasons. The main reason for the detected trends is increased precipitation, including heavy rainfall during the warm season. In contrast to this, the total annual suspended sediment load of the river (especially that which was snowmelt-induced) and, consequently, soil/gully erosion intensity have experienced a significant decrease in recent decades (up to 58% between 1960–1980 and 2010–2018). Land-use/-cover changes (a reduction of cultivated land area and agricultural machinery, a decline of livestock in pastures) following the collapse of the Soviet Union are considered the main reasons for this decrease. The most noticeable changes in water discharge, suspended sediment load, and erosion intensity were observed in the most agriculturally developed southwest and south parts of the Vyatka River basin. All the above trends may be considered with a high probability to be representative for the south sector of the taiga zone of the East European Plain.

An investigation on the effect of land use land cover changes on surface water quantity

2017 ◽  
Vol 18 (2) ◽  
pp. 490-503 ◽  
Author(s):  
Mahsa Mirhosseini ◽  
Parvin Farshchi ◽  
Ali Akbar Noroozi ◽  
Mahmood Shariat ◽  
Ali Asghar Aalesheikh
Keyword(s):  
Land Use ◽  
Surface Water ◽  
Land Cover ◽  
River Basin ◽  
River Discharge ◽  
Water Discharge ◽  
Water Quantity ◽  
Irrigated Agriculture ◽  
Land Use Land Cover ◽  
Changing Trend

Abstract The present study is an attempt to show how changes in land use and land cover would change the quantity of surface water resources in a river basin in northwestern Iran. In order to detect the changing trend of surface water quantity in the river basin, the long-term statistic data of sediment load and river discharge were gathered over the period between 1987 and 2013. For land use change detection of the river basin, the land use land cover maps of the study area in the years of 1987, 1998, 2002, 2009, and 2013 were prepared from Landsat satellite images using supervised classification method. The changing trend of river discharge showed a significant and positive relationship with rain-fed agriculture (R2 = 0.8152), poor rangeland (R2 = 0.7978), and urban areas (R2 = 0.8377). There was also a strong negative correlation between water discharge and irrigated agriculture (R2 = 0.7286) and good rangeland (R2 = 0.8548). In conclusion, increasing the area of rain-fed agriculture, good rangeland (type IV), and urban land uses, due to their effects on increasing the runoff, have caused an increase in the water flow of Zanjanroud River.

scholarly journals Land-Use and Land-Cover (LULC) Change Detection and the Implications for Coastal Water Resource Management in the Wami–Ruvu Basin, Tanzania

2021 ◽  
Vol 13 (8) ◽  
pp. 4092
Author(s):  
Jamila Ngondo ◽  
Joseph Mango ◽  
Ruiqing Liu ◽  
Joel Nobert ◽  
Alfonse Dubi ◽  
...  
Keyword(s):  
Land Use ◽  
Water Resources ◽  
Land Cover ◽  
Change Detection ◽  
Water Resource Management ◽  
Water Discharge ◽  
Bare Soil ◽  
Training Data ◽  
Lulc Change ◽  
Lulc Changes

Evaluation of river basins requires land-use and land-cover (LULC) change detection to determine hydrological and ecological conditions for sustainable use of their resources. This study assessed LULC changes over 28 years (1990–2018) in the Wami–Ruvu Basin, located in Tanzania, Africa. Six pairs of images acquired using Landsat 5 TM and 8 OLI sensors in 1990 and 2018, respectively, were mosaicked into a single composite image of the basin. A supervised classification using the Neural Network classifier and training data was used to create LULC maps for 1990 and 2018, and targeted the following eight classes of agriculture, forest, grassland, bushland, built-up, bare soil, water, and wetland. The results show that over the past three decades, water and wetland areas have decreased by 0.3%, forest areas by 15.4%, and grassland by 6.7%, while agricultural, bushland, bare soil, and the built-up areas have increased by 11.6%, 8.2%, 1.6%, and 0.8%, respectively. LULC transformations were assessed with water discharge, precipitation, and temperature, and the population from 1990 to 2018. The results revealed decreases in precipitation, water discharge by 4130 m3, temperature rise by 1 °C, and an increase in population from 5.4 to 10 million. For proper management of water-resources, we propose three strategies for water-use efficiency-techniques, a review legal frameworks, and time-based LULC monitoring. This study provides a reference for water resources sustainability for other countries with basins threatened by LULC changes.

scholarly journals KAJIAN KERUSAKAN DAN KERUNTUHAN TUBUH BENDUNGAN AKIBAT PENGARUH BANJIR (STUDI KASUS : BENDUNGAN CIPAMINGKIS KAB. BOGOR)

2021 ◽  
Vol 14 (2) ◽  
pp. 113
Author(s):  
Heri Suherlan
Keyword(s):  
Land Use ◽  
Carrying Capacity ◽  
Rainy Season ◽  
Water Discharge ◽  
The Body ◽  
Rice Fields ◽  
The Impact ◽  
Damage Study

Land use in the vicinity of Cipamingkis Sub-watershed is currently very intensive, so that damage to land which is feared has an impact on the level of fertility and carrying capacity of the land, resulting in the danger of flooding, erosion and landslides in the rainy season, as well as a decrease in water discharge and lack of groundwater in the season dry. The impact of these conditions Cipamingkis Weir in Sukasirna Village, Jonggol District on April 20, 2017 there was a breakdown of the lighthouse and the body of the weir which was built since 1982, the dam irrigated 4579 Ha of rice fields, unable to irrigate and in the lower reaches of the dam a lot of damage, including: eroded riverbanks, damaged river cliffs, and part of the land cracked and landslides.Seeing the condition needs to be made a research on Cipamingkis Dam Damage Study. This handling is urgently needed to reduce and reduce the consequences caused in the process of activities that cause erosion and flooding.

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