Comparison of performance of tile drainage routines in SWAT 2009 and 2012 in an extensively tile-drained watershed in the Midwest

Guo, Ten-Huei; Gitau, Margaret W.; Merwade, Venkatesh; Arnold, Jeffrey G.; Srinivasan, Raghavan; Hirschi, M. C.; Engel, Bernard A.

doi:10.5194/hess-22-89-2018

Cited by 45 publications

(45 citation statements)

References 49 publications

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“…Subsurface pipe drainage combined with freshwater flushing is one of the most direct and efficient methods of improving soil quality, and has been used widely (Christen and Skehan, ; Guo et al ., ). Smedema et al .…”

Section: Introductionmentioning

confidence: 97%

Effects of subsurface pipe drainage on soil salinity in saline‐sodic soil under mulched drip irrigation

Wang

Heng

et al. 2019

Irrigation and Drainage

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The increasing prevalence of alkali‐saline soil is a major challenge to the sustainable development of agriculture. In this study, a subsurface pipe drainage experiment using different pipe spacing (10, 15, 20 and 25 m) was conducted to reduce soil salinity. The results indicated that the salt content of the 0–80 cm soil layer decreased from 35 to 15 g kg‾¹ after being treated with subsurface pipe drainage. In contrast, the control treatment of ditch drainage had a limited effect on decreasing the soil salinity, the salt content remaining at 25–35 g kg‾¹. In total, 2030 m3 water and 280 t salt were drained during the experiment. Of the subsurface drainage pipe treatments (i.e. spacing at 10, 15, 20 and 25 m) 365, 672, 514 and 479 m3 water were drained, respectively, as well as 66.4, 102, 59.2 and 52.3 t salt, respectively. In addition, the average drainage rate achieved by subsurface drainage pipes was 1.64 m3 h‾¹ and the salt leaching intensity was 46.3 t hm‾2. The optimal pipe spacing for reducing soil salinity was 15 m, with an effective desalination rate reaching 65.8%. At this spacing, the average drainage rate was 2.87 m3 h‾¹ and the salt leaching intensity was 150 t hm‾2. Moreover, the survival rate of cotton at 15 m spacing exceeded 60%. © 2019 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 97%

Effects of subsurface pipe drainage on soil salinity in saline‐sodic soil under mulched drip irrigation

Wang

Heng

et al. 2019

Irrigation and Drainage

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“…There are others spatial modules with designate functions: (i) outlets, can be used to add/remove water from the watershed; (ii) canals; can be used to conduct water diversion among irrigation regions; (iii) pumps, can be extracted from any aquifer to specified spatial object; (iv) herds, can be applied to biomass and the associated grazing conditions; and, (v) water rights, can be assigned by different share of water demand. More details can also be found in [17].…”

Section: Swat+mentioning

confidence: 99%

“…SWAT is used to perform watershed-scale simulations for flow, sediment, nutrient, pesticide, and bacteria [8][9][10][11][12]. Before one can apply SWAT for actual practices such as assigning conservation scenarios or investigating climate change impacts, the corresponding model parameters should be properly adjusted in model calibration processes to reflect watershed systems [13][14][15][16][17]. However, a complex watershed simulation model like SWAT comes along with a large number of undefined model parameters, whereas the ordinary manual calibration approach may not well serve some projects in a timely matter (note that manual calibration approach is so far the best way for modelers to understand detailed model processes).…”

Section: Introductionmentioning

confidence: 99%

IPEAT+: A Built-In Optimization and Automatic Calibration Tool of SWAT+

Yen

Park

Arnold

et al. 2019

Water

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For almost 30 years, the Soil and Water Assessment Tool (SWAT) has been successfully implemented to address issues around various scientific subjects in the world. On the other hand, it has been reaching to the limit of potential flexibility in further development by the current structure. The new generation SWAT, dubbed SWAT+, was released recently with entirely new coding features. SWAT+ is designed to have far more advanced functions and capacities to handle challenging watershed modeling tasks for hydrologic and water quality processes. However, it is still inevitable to conduct model calibration before the SWAT+ model is applied to engineering projects and research programs. The primary goal of this study is to develop an open-source, easy-to-operate automatic calibration tool for SWAT+, dubbed IPEAT+ (Integrated Parameter Estimation and Uncertainty Analysis Tool Plus). There are four major advantages: (i) Open-source code to general users; (ii) compiled and integrated directly with SWAT+ source code as a single executable; (iii) supported by the SWAT developer group; and, (iv) built with efficient optimization technique. The coupling work between IPEAT+ and SWAT+ is fairly simple, which can be conducted by users with minor efforts. IPEAT+ will be regularly updated with the latest SWAT+ revision. If users would like to integrate IPEAT+ with various versions of SWAT+, only few lines in the SWAT+ source code are required to be updated. IPEAT+ is the first automatic calibration tool integrated with SWAT+ source code. Users can take advantage of the tool to pursue more cutting-edge and forward-thinking scientific questions.

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“…and river routing (water, sediment, and in-stream water quality) to the watershed outlet through the river network. Additional details on SWAT applications can be found in [33][34][35].…”

Section: Swat Model and Glacier Modulementioning

confidence: 99%

Multi-Objective Calibration of a Distributed Hydrological Model in a Highly Glacierized Watershed in Central Asia

Fang

Jian

Chen

2019

Water

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Understanding glacio-hydrological processes is crucial to water resources management, especially under increasing global warming. However, data scarcity makes it challenging to quantify the contribution of glacial melt to streamflow in highly glacierized catchments such as those in the Tienshan Mountains. This study aims to investigate the glacio-hydrological processes in the SaryDjaz-Kumaric River (SDKR) basin in Central Asia by integrating a degree-day glacier melt algorithm into the macro-scale hydrological Soil and Water Assessment Tool (SWAT) model. To deal with data scarcity in the alpine area, a multi-objective sensitivity analysis and a multi-objective calibration procedure were used to take advantage of all aspects of streamflow. Three objective functions, i.e., the Nash–Sutcliffe efficiency coefficient of logarithms (LogNS), the water balance index (WBI), and the mean absolute relative difference (MARD), were considered. Results show that glacier and snow melt-related parameters are generally sensitive to all three objective functions. Compared to the original SWAT model, simulations with a glacier module match fairly well to the observed streamflow, with the Nash–Sutcliffe efficiency coefficient (NS) and R2 approaching 0.82 and an absolute percentage bias less than 1%. Glacier melt contribution to runoff is 30–48% during the simulation period. The approach of combining multi-objective sensitivity analysis and optimization is an efficient way to identify important hydrological processes and recharge characteristics in highly glacierized catchments.

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Comparison of performance of tile drainage routines in SWAT 2009 and 2012 in an extensively tile-drained watershed in the Midwest

Cited by 45 publications

References 49 publications

Effects of subsurface pipe drainage on soil salinity in saline‐sodic soil under mulched drip irrigation

Effects of subsurface pipe drainage on soil salinity in saline‐sodic soil under mulched drip irrigation

IPEAT+: A Built-In Optimization and Automatic Calibration Tool of SWAT+

Multi-Objective Calibration of a Distributed Hydrological Model in a Highly Glacierized Watershed in Central Asia

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