DRIFT-ARID: Application of a method for environmental water requirements (EWRs) in a non-perennial river (Mokolo River) in South Africa

被引：15

作者：

Seaman, Maitland ^{[1
]}

Watson, Marie ^{[1
]}

Avenant, Marinda ^{[1
]}

Joubert, Alison ^{[2
]}

King, Jackie ^{[3
]}

Barker, Charles ^{[4
]}

Esterhuyse, Surina ^{[1
]}

Graham, Douglas ^{[5
]}

Kemp, Marthie ^{[1
]}

le Roux, Pieter ^{[6
]}

Prucha, Bob ^{[7
]}

Redelinghuys, Nola ^{[8
]}

Rossouw, Linda ^{[9
]}

Rowntree, Kate ^{[10
]}

Sokolic, Frank ^{[1
]}

van Rensburg, Leon ^{[6
]}

van der Waal, Bennie ^{[10
]}

van Tol, Johan ^{[11
]}

Vos, Tascha ^{[1
]}

机构：

[1] Univ Free State, Ctr Environm Management, POB 339, Bloemfontein, South Africa

[2] Southern Waters, POB 12414, Cape Town, South Africa

[3] Water Matters, POB 209, Constantia, South Africa

[4] Univ Free State, Dept Geog, POB 339, Bloemfontein, South Africa

[5] DHI, Agern Alle 5, DK-2970 Horsholm, Denmark

[6] Univ Free State, Soil Crop & Climate Sci Dept, POB 339, Bloemfontein, South Africa

[7] DHI Water & Environm, 141 Union Blvd,Suite 425, Lakewood, CO USA

[8] Univ Free State, Dept Sociol, POB 339, Bloemfontein, South Africa

[9] Environm & Water Qual Consultant, POB 16018, ZA-7506 Panorama, South Africa

[10] Rhodes Univ, Dept Geog, POB 94, Grahamstown, South Africa

[11] Univ Ft Hare, Private Bag X1314, Alice, South Africa

来源：

WATER SA | 2016年 / 42卷 / 03期

关键词：

DRIFT-ARID; non-perennial; EWR; flow method; Mokolo River; FLOW ASSESSMENTS;

D O I：

10.4314/wsa.v42i3.02

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

Methods developed to determine the amount of water required (EWR) to sustain ecosystem services in non-perennial rivers need a different approach to those used in perennial rivers. Current EWR methods were mostly developed for use in perennial rivers. Non-perennial rivers differ from perennial ones in terms of variability in flow, periods of no-flow and related habitat availability. A DRIFT-ARID method (an adaptation of the Downstream Response to Imposed Flow Transformation (DRIFT) method) was developed, tested and adjusted, using the semi-permanent Mokolo River. Field data from five study sites was collected from April to May 2010 by a multidisciplinary team. The results were used in a DRIFT-ARID Decision Support System (DSS) to determine the impact of five chosen development scenarios in the Mokolo River Catchment. An integrated groundwater-surface water MIKE-SHE hydrological model was used to simulate the hydrology of the chosen scenarios. Specific non-perennial river indicators such as onset of dry phase were identified and included in the DRIFT-ARID DSS. DRIFT-ARID has the potential to be used in non-perennial rivers and, once set up, can provide results for future scenarios. The method now needs to be tested on other non-perennial river types, especially episodic rivers where data are scarce or non-existent.

引用

页码：368 / 383

页数：16

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