scholarly journals Implications of water management representations for watershed hydrologic modeling in the Yakima River basin

2019 ◽  
Vol 23 (1) ◽  
pp. 35-49 ◽  
Author(s):  
Jiali Qiu ◽  
Qichun Yang ◽  
Xuesong Zhang ◽  
Maoyi Huang ◽  
Jennifer C. Adam ◽  
...  
Keyword(s):  
Water Management ◽  
River Basin ◽  
Reservoir Operation ◽  
Management Practices ◽  
Swat Model ◽  
Irrigation Management ◽  
Watershed Hydrology ◽  
Reservoir Operations ◽  
Yakima River ◽  
Intensively Managed

Abstract. Water management substantially alters natural regimes of streamflow through modifying retention time and water exchanges among different components of the terrestrial water cycle. Accurate simulation of water cycling in intensively managed watersheds, such as the Yakima River basin (YRB) in the Pacific Northwest of the US, faces challenges in reliably characterizing influences of management practices (e.g., reservoir operation and cropland irrigation) on the watershed hydrology. Using the Soil and Water Assessment Tool (SWAT) model, we evaluated streamflow simulations in the YRB based on different reservoir operation and irrigation schemes. Simulated streamflow with the reservoir operation scheme optimized by the RiverWare model better reproduced measured streamflow than the simulation using the default SWAT reservoir operation scheme. Scenarios with irrigation practices demonstrated higher water losses through evapotranspiration (ET) and matched benchmark data better than the scenario that only considered reservoir operations. Results of this study highlight the importance of reliably representing reservoir operations and irrigation management for credible modeling of watershed hydrology. The methods and findings presented here hold promise to enhance water resources assessment that can be applied to other intensively managed watersheds.

scholarly journals Implications of water management representations for watershed hydrologic modeling in the Yakima River Basin

2018 ◽  
Author(s):  
Jiali Qiu ◽  
Qichun Yang ◽  
Xuesong Zhang ◽  
Maoyi Huang ◽  
Jennifer C. Adam ◽  
...  
Keyword(s):  
Water Management ◽  
River Basin ◽  
Reservoir Operation ◽  
Swat Model ◽  
Irrigation Management ◽  
Agricultural Watershed ◽  
Watershed Hydrology ◽  
Reservoir Operations ◽  
Yakima River ◽  
Intensively Managed

Abstract. Water management substantially alters natural regimes of streamflow through modifying retention time and water exchanges among different components of the terrestrial water cycle. Accurate simulation of water cycling in intensively managed watersheds, such as the Yakima River Basin (YRB) in the Pacific Northwest of the U.S., faces challenges in reliably characterizing influences of management practices (e.g., reservoir operation and cropland irrigation) on the watershed hydrology. Using the Soil and Water Assessment Tool (SWAT) model, we evaluated streamflow simulations in the YRB based on different reservoir operation and irrigation schemes. Simulated streamflow with the reservoir operation scheme optimized by the RiverWare model better reproduced measured streamflow than the simulation using default SWAT reservoir operation scheme. Scenarios with irrigation practices demonstrated higher water losses through evapotranspiration (ET), and matched benchmark data better than the scenario that only considered reservoir operations. Results of this study highlight the importance of reliably representing reservoir operations and irrigation management for credible modeling of watershed hydrology. Both SWAT and RiverWare are community-based and have been widely tested and applied for reservoir operations and agricultural watershed modeling in regions across the globe. As such, the methods and findings presented here hold the promise to apply to other intensively managed watersheds to enhance water resources assessment.

scholarly journals Study on Physiological Parameters and Economics of Rice Cultivation under Different Establishment Methods and Water Management Practices

2020 ◽  
pp. 123-131
Author(s):  
S. Selvakumar ◽  
S. Sakthivel ◽  
Akihiko Kamoshita ◽  
R. Babu ◽  
S. Thiyageshwari ◽  
...  
Keyword(s):  
Water Management ◽  
Field Experiment ◽  
Water Level ◽  
Water Scarcity ◽  
Tamil Nadu ◽  
Management Practices ◽  
Irrigation Management ◽  
Management Strategies ◽  
Soil Surface ◽  
Physiological Parameters

A field experiment was conducted at Tamil Nadu Agricultural University, Agricultural College and Research Institute, Madurai, Tamil Nadu, India, during summer 2019 to study about the changes in physiological parameters of rice under various establishment and water management strategies and to find out the suitable method of rice establishment and irrigation management practices for tank irrigated command areas during water scarcity situation. Field experiment comprised of four establishment methods in combination with four irrigation management strategies. Medium duration fine grain rice variety TKM 13 was used for the study. Results of the study revealed that machine transplanting under unpuddled soil combined with irrigation after formation of hairline crack recorded improved physiological parameters and yield. It was on par with machine transplanting under unpuddled soil combined with irrigation when water level reaches 5 cm below soil surface. Higher gross return, net return and B:C ratio were observed with machine transplanting under unpuddled soil combined with irrigation after formation of hairline crack. This was followed by machine transplanting under unpuddled soil combined with irrigation when water level reaches 5 cm below soil. Hence, the result of study concluded that machine transplanting under unpuddled soil combined with irrigation when water level reaches 5 cm below soil surface can be recommended as the suitable technology for the farmers of tank irrigated command area to get higher return with minimum use of resources under water scarcity situation.

scholarly journals Development of SWAT-PADDY for Simulating Lowland Paddy Fields

2016 ◽  
Author(s):  
Ryota Tsuchiya ◽  
Tasuku Kato ◽  
Jaehak Jeong
Keyword(s):  
Water Balance ◽  
Management Practices ◽  
Swat Model ◽  
Irrigation Management ◽  
Agricultural Watershed ◽  
Paddy Fields ◽  
Balance Model ◽  
Return Flow ◽  
Modified Model ◽  
Paddy Cultivation

The consumption of rice, which recently increases globally, leads to requirement for planning sustainable water management for paddy cultivation. In this research, SWAT model was modified to evaluate sustainability of paddy cultivation. Modifications to simulate paddy cultivation are 1) to equip with a new water balance model of impounded fields, 2) to add an irrigation management option for paddy fields, which is characterized by flood irrigation managed by farmers on a daily basis, 3) to consider puddling operation that influences water quality and infiltration rate of soil. The enhanced model, named SWAT-PADDY, was applied to an agricultural watershed in Japan as a case study. The modified model succeeded in representing paddy cultivation in the study area. However, SWAT-PADDY underestimated base flow in irrigation period. The cause of this is inferred that the modified model doesn’t represent return flow of excess withdrawal of river water. In conclusion, addition of the models of impoundment and management practices in paddy fields to SWAT improved field scale simulation of water balance and irrigation in paddy fields. However, further improvement of the model on irrigation return flow process is needed to better predict hydrology of watersheds dominated by paddy irrigation.

Effects of Irrigation Management Practices on Water Allocation Among Farmers in Kiladeda Sub-Catchment, Tanzania

2019 ◽  
pp. 105-121
Author(s):  
Mwadini Khatib ◽  
Joy Obando ◽  
Shadrack Murimi
Keyword(s):  
Water Management ◽  
Irrigation Water ◽  
Water Demand ◽  
Management Practices ◽  
Irrigation Management ◽  
Weap Model ◽  
Cross Sectional ◽  
Water Abstraction ◽  
Irrigation Water Management ◽  
Irrigation Water Demand

Kiladeda River in Pangani Basin, Tanzania plays a vital role of providing water for agricultural activities of the sub-catchment. However, it is experiencing a problem of inequitable distribution of irrigation water among farmers. Cross-sectional data was collected from farmers both in upstream and downstream using questionnaires, while river discharge measurements were conducted in referenced spot gauging stations. WEAP model was used to analyze water demand and allocation among farmers. Furrow irrigation (94%) and plastic buckets (6%) were the main irrigation water management practices. The model results revealed a water shortage of 46.4% of the total irrigation water required. The annual irrigation water demand and unmet demand were 13.93mm3 and 7.47mm3, respectively, and are both expected to increase twice in 2020. This high water demand for irrigation could be the main cause of excessive water abstraction. A partnering approach is recommended to improve irrigation water management, reviewing of laws, regulations, and water rights.

Improved Irrigation Management for Sustainable Agriculture

2015 ◽  
pp. 357-378 ◽  
Author(s):  
Vesna Popović ◽  
Vladan Ugrenović
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Natural Resources ◽  
Management Practices ◽  
Irrigation Management ◽  
Sustainable Intensification ◽  
Green Economy ◽  
Irrigation Development ◽  
The Republic

Studying the future of food and farming, scientists have called for sustainable intensification to simultaneously raise yields and increase efficiency in the use of inputs and reduce the negative environmental effects of food production. Sustainable intensification requires sustainable agricultural techniques such as improved water management practices that result in higher, stabilized, and diversified agricultural production, and greater resilience to climate change without the deterioration of natural resources and the environment. This chapter is devoted to the role of irrigation development in Serbian agriculture and its contribution to the development of the green economy in the Republic of Serbia.

scholarly journals Linked hydrologic and social systems that support resilience of traditional irrigation communities

2015 ◽  
Vol 19 (1) ◽  
pp. 293-307 ◽  
Author(s):  
A. Fernald ◽  
S. Guldan ◽  
K. Boykin ◽  
A. Cibils ◽  
M. Gonzales ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Management Practices ◽  
Irrigation System ◽  
Social Systems ◽  
Irrigation Management ◽  
Hydrologic Processes ◽  
Traditional Local Knowledge ◽  
The Face ◽  
Traditional Irrigation

Abstract. Southwestern US irrigated landscapes are facing upheaval due to water scarcity and land use conversion associated with climate change, population growth, and changing economics. In the traditionally irrigated valleys of northern New Mexico, these stresses, as well as instances of community longevity in the face of these stresses, are apparent. Human systems have interacted with hydrologic processes over the last 400 years in river-fed irrigated valleys to create linked systems. In this study, we ask if concurrent data from multiple disciplines could show that human-adapted hydrologic and socioeconomic systems have created conditions for resilience. Various types of resiliencies are evident in the communities. Traditional local knowledge about the hydrosocial cycle of community water management and ability to adopt new water management practices is a key response to disturbances such as low water supply from drought. Livestock producers have retained their irrigated land by adapting: changing from sheep to cattle and securing income from outside their livestock operations. Labor-intensive crops decreased as off-farm employment opportunities became available. Hydrologic resilience of the system can be affected by both human and natural elements. We find, for example, that there are multiple hydrologic benefits of traditional irrigation system water seepage: it recharges the groundwater that recharges rivers, supports threatened biodiversity by maintaining riparian vegetation, and ameliorates impacts of climate change by prolonging streamflow hydrographs. Human decisions to transfer water out of agriculture or change irrigation management, as well as natural changes such as long-term drought or climate change, can result in reduced seepage and the benefits it provides. We have worked with the communities to translate the multidisciplinary dimensions of these systems into a common language of causal loop diagrams, which form the basis for modeling future scenarios to identify thresholds and tipping points of sustainability. Early indications are that these systems, though not immune to upheaval, have astonishing resilience.

scholarly journals Evaluation of best management practices for non-point source pollution based on the SWAT model in the Hanjiang River Basin, China

2021 ◽  
Author(s):  
Shu Li ◽  
Jiake Li ◽  
Gairui Hao ◽  
Yajiao Li
Keyword(s):  
Point Source ◽  
River Basin ◽  
Best Management Practices ◽  
Management Practices ◽  
Swat Model ◽  
Forest Land ◽  
Best Management ◽  
Flood Season ◽  
Nps Pollution ◽  
Hanjiang River

Abstract Taking the Hanjiang River basin with Ankang hydrological station as the control section as the study area, the Soil and Water Assessment Tool (SWAT) model is used to identify the spatial and temporal distribution of non-point source (NPS) pollution and determine the critical source areas (CSA). Then we set up 11 best management practices (BMPs) in the CSA and evaluate their environmental and comprehensive benefits. The results show that TN and TP loads in flood season are significantly higher than that in non-flood season. The distribution of loss intensity of TN and TP load has a strong correlation with runoff and sediment erosion intensity, respectively. Among the 8 individual BMPs, the reduction rates of stubble coverage, grassed waterway and returning farmland to forest land are relatively high, and the comprehensive attribute value Z of stubble coverage is the highest. Among the 3 combined BMPs, the reduction rate of ‘stubble coverage + grassed waterway + returning farmland to forest land (>25°)’ is the highest and the Z value is the largest. Overall, the BMPs such as stubble coverage, grassed waterway, and returning farmland to forest land can be adopted alternately to control NPS pollution in the Hanjiang river basin.

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