Ensemble streamflow projections for a small watershed with HSPF model

2019 ◽  
Vol 26 (35) ◽  
pp. 36023-36036 ◽  
Author(s):  
Mine Albek ◽  
Erdem Ahmet Albek ◽  
Serdar Göncü ◽  
Burcu Şimşek Uygun
Keyword(s):  
Small Watershed ◽  
Hspf Model

scholarly journals Erosion Transportation Processes as Influenced by Gully Land Consolidation Projects in Highly Managed Small Watersheds in the Loess Hilly–Gully Region, China

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1540
Author(s):  
Qianqian Ji ◽  
Zhe Gao ◽  
Xingyao Li ◽  
Jian’en Gao ◽  
Gen’guang Zhang ◽  
...  
Keyword(s):  
Similarity Theory ◽  
Design Method ◽  
Simulation Method ◽  
Practical Significance ◽  
Land Consolidation ◽  
Small Watershed ◽  
Flood Peak ◽  
Erosion Area ◽  
The Impact ◽  
Erosion Environment

The Loess Hilly–Gully region (LHGR) is the most serious soil erosion area in the world. For the small watershed with high management in this area, the scientific problem that has been paid attention to in recent years is the impact of the land consolidation project on the erosion environment in the gully region. In this study, the 3D simulation method of vegetation, eroded sediment and pollutant transport was innovated based on the principles of erosion sediment dynamics and similarity theory, and the impacts of GLCP were analyzed on the erosion environment at different scales. The verification results show that the design method and the scale conversion relationship (geometric scale: λl = 100) were reasonable and could simulate the transport process on the complex underlying surface of a small watershed. Compared with untreated watersheds, a significant change was the current flood peak lagging behind the sediment peak. There were two important critical values of GLCP impact on the erosion environment. The erosion transport in HMSW had no change when the proportion was less than 0.85%, and increased obviously when it was greater than 3.3%. The above results have important theoretical and practical significance for watershed simulation and land-use management in HMSW.

Reforestation Influences on Small Watershed Streamflow

1971 ◽  
Vol 7 (4) ◽  
pp. 845-852 ◽  
Author(s):  
J. L. McGuinness ◽  
L. L. Harrold
Keyword(s):  
Small Watershed

The Origin of Chemical Variations in Groundwaters from a Small Watershed in Southwestern Ontario

1974 ◽  
Vol 11 (7) ◽  
pp. 893-904 ◽  
Author(s):  
Franklin W. Schwartz
Keyword(s):  
Porous Medium ◽  
Cation Exchange ◽  
Unique Feature ◽  
Shallow Groundwater ◽  
Ionic Species ◽  
Small Watershed ◽  
Gas Generation ◽  
Groundwater System ◽  
Creek Watershed ◽  
Pass Through

A very striking and unique feature of the groundwater system within the Upper Kettle Creek watershed is the marked concentration decrease of nearly all ionic species in the direction of flow. The conceptual model proposed here attributes this decrease to selective ion filtration by the Port Stanley till. Ionic constituents generated in the shallow groundwater zone by dissolution of the porous medium either pass through the till or accumulate depending upon their relative mobilities. Other important processes that influence the composition of the groundwaters are cation exchange within the Port Stanley till, CO2 gas generation within the soil zones of recharge areas, and the upward leakage of H2S gas from deeper in the Paleozoic section.

scholarly journals Runoff and sediment yield from a small watershed in southeastern Spain (Lanjarón): implications for water quality

2012 ◽  
Vol 57 (8) ◽  
pp. 1610-1625 ◽  
Author(s):  
Víctor Hugo Durán Zuazo ◽  
José Ramón Francia Martínez ◽  
Iván García Tejero ◽  
Carmen Rocío Rodríguez Pleguezuelo ◽  
Armando Martínez Raya ◽  
...  
Keyword(s):  
Water Quality ◽  
Sediment Yield ◽  
Small Watershed ◽  
Southeastern Spain ◽  
Runoff And Sediment Yield

scholarly journals Derivation of S-Curve from Oscillatory Hydrograph Using Digital Filter

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1456
Author(s):  
Kee-Won Seong ◽  
Jang Hyun Sung
Keyword(s):  
Digital Filter ◽  
Model Performance ◽  
Performance Criteria ◽  
Rainfall Runoff ◽  
Small Watershed ◽  
Unit Hydrograph ◽  
Time To Peak ◽  
S Curve ◽  
And Performance ◽  
Smooth Data

An oscillatory S-curve causes unexpected fluctuations in a unit hydrograph (UH) of desired duration or an instantaneous UH (IUH) that may affect the constraints for hydrologic stability. On the other hand, the Savitzky–Golay smoothing and differentiation filter (SG filter) is a digital filter known to smooth data without distorting the signal tendency. The present study proposes a method based on the SG filter to cope with oscillatory S-curves. Compared to previous conventional methods, the application of the SG filter to an S-curve was shown to drastically reduce the oscillation problems on the UH and IUH. In this method, the SG filter parameters are selected to give the minimum influence on smoothing and differentiation. Based on runoff reproduction results and performance criteria, it appears that the SG filter performed both smoothing and differentiation without the remarkable variation of hydrograph properties such as peak or time-to peak. The IUH, UH, and S-curve were estimated using storm data from two watersheds. The reproduced runoffs showed high levels of model performance criteria. In addition, the analyses of two other watersheds revealed that small watershed areas may experience scale problems. The proposed method is believed to be valuable when error-prone data are involved in analyzing the linear rainfall–runoff relationship.

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