scholarly journals GLOBAL ESTIMATION OF ENVIRONMENTAL FLOW REQUIREMENT BASED ON RIVER RUNOFF SEASONALITY

2005 ◽  
Vol 49 ◽  
pp. 391-396 ◽  
Author(s):  
Naoki SHIRAKAWA
Keyword(s):  
River Runoff ◽  
Environmental Flow ◽  
Global Estimation ◽  
Flow Requirement

scholarly journals Quantification of Environmental Flow Requirement for some Rivers in West Java

2020 ◽  
Vol 148 ◽  
pp. 07003
Author(s):  
Waluyo Hatmoko ◽  
Levina ◽  
Radhika ◽  
Amirwandi ◽  
Rendy
Keyword(s):  
Water Conservation ◽  
Environmental Flow ◽  
Dry Season ◽  
Mean Flow ◽  
West Java ◽  
Food And Agriculture ◽  
Food And Agriculture Organization ◽  
Tennant Method ◽  
The Mean ◽  
Flow Requirement

Sustainable Development Goal (SDG). Water management is making a balance between water for livelihood and water as a resource. Environmental Flow Requirement (EFR) is water conservation, on the side of the water for livelihood, to sustain the river ecosystem. In Indonesia, the common quantification of EFR is dependable flow Q95%. However, there are alternative quantities: a) Guideline of irrigation states that 5% from the available water in the river is for environmental purposes; b) Adoption of the Tennant Method of using 10% of the mean flow; and recently Food and Agriculture Organization (FAO) in the framework of SDG proposed that in Java Island the EFR is from 40% to 50% of the mean annual flow. This paper discusses several ways of quantification of the EFR in Indonesia, and apply the different EFR quantities to Citarum, Cimanuk, and Cimandiri Rivers in West Java. It is concluded that EFR quantity according to FAO that might be suitable for the rivers in the pristine catchments in the southern part of West Java is too high for the rivers in the northern part of West Java which is heavily populated and maturely developed. Furthermore, the dependable flow of Q95% is found to be close to the quantity of FAO, but in the dry season, Q95% is more suitable. It is recommended using a modified FAO that combine with Q95% during the dry season.

Assessment of environmental flow requirement effects at an estuary

2013 ◽  
Vol 166 (8) ◽  
pp. 411-421 ◽  
Author(s):  
Seyed Ehsan Fatemi ◽  
Freydon Vafaie ◽  
Hans Bressers
Keyword(s):  
Environmental Flow ◽  
Flow Requirement

scholarly journals Application of a hydrological method for determining monthly environmental flow in Code River, Indonesia

2021 ◽  
Vol 933 (1) ◽  
pp. 012015
Author(s):  
Adam Rus Nugroho
Keyword(s):  
Temporal Variability ◽  
Environmental Flow ◽  
Dry Season ◽  
Habitat Conditions ◽  
Wet Season ◽  
Riverine Ecosystem ◽  
Tennant Method ◽  
Flow Requirement

Abstract The declining groundwater in Yogyakarta could potentially affect the Code River baseflow, thus lowering the river streamflow. Consequently, the riverine ecosystem would suffer from a low quantity of streamflow. The quantity standard of streamflow can be determined by calculating the environmental flow. In this study, the environmental flow requirement (EFR) for the Code River is determined by applying an enhanced version of the most-used hydrological method, namely the Modified Tennant Method based on Multilevel Habitat Conditions III (MTMMHC-III). The EFR in the Code River could be calculated successfully by the MTMMHC-III with a satisfactory temporal variability. The EFRs are the lowest during July to October in the normal years, July to September in the wet years, and July to December in the dry years. The EFRs are highest during January to April in the normal and dry years and January to May in the wet years. However, the EFR might become too low in the dry years, especially from the beginning of the dry season (May) until the early wet season (December), with only 4-11% of the average annual flow. Ultimately, the MTMMHC-III method is a better hydrological method than the original Tennant Method and Q95 method.

Sign in / Sign up

Export Citation Format

Share Document